Mitsubishi Electric MSH09TW, MUH09TW, MSH12TN, MUH12TN, MSH15TN Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

L

I

S

T

E

D

CUS

SERVICE MANUAL

Wireless type
Models

MSH09TW · MUH09TW
MSH12TN · MUH12TN
MSH15TN · MUH15TN
MSH17TN · MUH17TN
MSH09TW
MSH12TN

MSH15TN
MSH17TN

-

-

-

-

· MUH09TW

· MUH12TN

· MUH12TN

· MUH15TN

· MUH15TN

· MUH17TN

Revision:

● MUH12TN- has been added.

● MUH15TN- has been added.

●REFRIGERANT SYSTEM DIAGRAM of

MXZ30TN and MXZ30TN2 has partly been
changed.

●PARTS LIST of MXZ30TN and MXZ30TN2
has partly been changed

●Please void OB275 Revised edition-C.

U2
U2

No. OB275

REVISED EDITION-D

U1U1

-

U1U1

-

U2

-

U1U1

-

U2

-

U1U1

-

Inverter-controlled multi system Model

Indication of

MSH12TN
MSH15TN
MSH17TN
INDOOR UNIT

MUH15TN
OUTDOOR UNIT

MSH12TN -
MSH15TN -
MSH17TN -

MUH15TN - MUH15TN -

U1
U1
U1

model name

Remote
controller

Indication of
model name

U2U1

· MXZ30TN

· MXZ30TN2

CONTENTS

1. FEATURES·························································2

2. TECHNICAL CHANGES····································5

3. PART NAMES AND FUNCTIONS······················7

4. INDOOR UNIT COMBINATION························10

5. SPECIFICATION···············································11

6. DATA·································································17

7. OUTLINES AND DIMENSIONS·······················39

8. WIRING DIAGRAM ··········································43

9. REFRIGERANT SYSTEM DIAGRAM··············51

10. MICROPROCESSOR CONTROL ····················54

11. SERVICE FUNCTIONS·····································72

12. TROUBLESHOOTING ······································75

13. DISASSEMBLY INSTRUCTIONS···················101

14. PARTS LIST····················································114

15. OPTIONAL PARTS·········································126

The Slim Line.
From Mitsubishi Electric.

TM

1

MSH12TN ­MSH15TN ­MSH17TN -

U1

U1

U1

MSH12TN
MSH15TN
MSH17TN

MSH09TW

MSH09TW -

U1

MUH09TW

MUH09TW -

U1

MUH15TN -

U1

MUH15TN -

U2

U1

MUH15TN

MUH17TN -

U1

MUH17TN

MXZ30TN MXZ30TN2

LCD wireless
remote controller

MUH12TN

MUH12TN-

U2

MUH12TN-

USA Remark

MSH09TW
MSH12TN
MSH15TN
MSH17TN

No

40min.

27˚F

38˚F

CANADA

RT63(Outdoor):
for protection in low ambient temperature

Refer to

U1
U1
U1
U1

DIFFERENT POINTS between models for USA and CANADA

AMBIENT
TEMPERATURE
THERMISTOR

INTERVAL
TIME

START
TEMPERATURE

FINISH
TEMPERATURE

DEFROSTING

Have

15min.

32˚F

50˚F

8. WIRING DIAGRAM

10. MICRO PROCESSOR CONTROL
10-1. -HEAT mode of "I FEEL CONTROL"-

5. Outdoor temperature control(P. 60)

10. MICRO PROCESSOR CONTROL
10-1. -HEAT mode of "I FEEL CONTROL"-

3. Defrosting (P.59)

11. SERVICE FUNCTIONS
11-2. CHANGE IN DEFROST SETTING(P.72)

for protection in low ambient temperature

MSH09TW ­MSH12TN ­MSH15TN ­MSH17TN -

Model

FEATURES

2

SWING

Model Cooling capacity Heating capacity SEER HSPF(44/55)

MSH09TW MSH09TW - 8,800Btu/h 10,500Btu/h 10.0 6.8/5.9
MSH12TN MSH12TN - 12,600/12,900Btu/h 13,000/13,500Btu/h 10.2 6.8/5.9
MSH15TN MSH15TN - 14,300/14,600Btu/h 14,500/14,800Btu/h 10.7 6.8/5.9
MSH17TN MSH17TN - 16,000/16,200Btu/h 16,800/17,200Btu/h 10.4 6.8/5.9

U1

U1

U1

U1

“I FEEL CONTROL” IN OUR LCD WIRELESS REMOTE CONTROLLER WITH ON/OFF PROGRAM TIMER

Mitsubishi Electric’s new wireless remote controller incorporates a number of advanced features that provide even greater con-

trol and ease-to-use. It has a liquid crystal display which indicates such information as mode, fan speed and temperature
selected as well as the programmed ON/OFF timer. It is also equipped with “I Feel Control”, a unique Mitsubishi Electric fea­ture that allows the user to adjust the temperature to exactly the level he or she wants simply by tapping the button that
describes present conditions : “Too Cool” or “Too Warm”. The optimum temperature set this way is then memorized for immedi­ate recall whenever the air conditioner is used again.

Select desired air flow direction.
REMOTE-CONTROL OPERATION MODE

Using the remote controller, you can select from five airflow set­tings to match room layout and the location of people. Also, you
can set the vane to swing automatically.

AUTO-RESTART FUNCTION

The auto-restart function restarts the equipment when power is

restored following an outage automatically. Operation resumes in
the mode in which the equipment was running immediately before
the outage.

HIGH PERFORMANCE ROTARY COMPRESSOR

The advanced design of Mitsubishi Electric’s powerful and energy

efficient rotary compressor results in lower operating costs and
longer service life.

3

Time

Set Temperature

Conventional
model

Inverter model

MXZ30TN MXZ30TN2

Time

Set Temperature

Conventional Model:

Temperature are
adjusted by switching the
compressor off and on.

Inverter Model:

Uniform temperatures are
maintained by finely tuned
control of compressor speed.

Optimum Comfort in Any Situation

Model Cooling capacity Heating capacity SEER HSPF(44)

MXZ30TN MXZ30TN2

28,400Btu/h

(4,160 - 30,500)

28,600Btu/h

(5,790 - 38,000)

11.0 7.5

Inverter Technology

Outdoor unit uses inverter compressor technology (Variable Frequency Drive) to provide exceptional indoor high-speed
cooling and heating.
By responding to indoor temperature changes, the system reduces power consumption by varying the compressor speed for
extra energy savings and performs only to the levels needed to maintain a constant and comfortable indoor environment.

Extra Energy Savings

For optimum performance inverter technology controls the electrical current to the compressor, delivering only the energy
needed to match the cooling and heat load of a room. This feature reduces energy consumption.

High-Speed Heating and Cooling

Compressor rotation is controlled to maximize
efficiency, changing speeds according to the cooling
and heating load of a room. This application means
the desired temperature is reached much faster.

Optimum Comfort Year-Round

Unlike conventional units that start and stop repetitively,
inverter units are able to detect subtle changes in room
temperature and adjust airflow automatically. This adaptation
means less temperature variation and more comfortable rooms.

4

2

TECHNICAL CHANGES

MSH09NW2 ➔ MSH09TW

1. Indoor unit has changed.

2. Remote controller has changed.

MSH12NN2 ➔ MSH12TN

1. Remote controller has changed.

2. Union size of connect pipe for gas has changed.

MSH15NN2 ➔ MSH15TN
MSH17NN2 ➔ MSH17TN

1. Remote controller has changed.

MUH09NW2 ➔ MUH09TW

1. Outdoor unit has changed.

MUH12NN2 ➔ MUH12TN

1. Outdoor unit has changed.

MUH15NN2 ➔ MUH15TN

1. Only model name has changed.

MUH17NN2 ➔ MUH17TN

1. Valve type has changed (Size for connecting pipe is the same).

MSH09NW2 - ➔ MSH09TW -

1. Indoor unit has changed.

2. Remote controller has changed.

MSH12NN2 - ➔ MSH12TN -

1. Remote controller has changed.

2. Union size of connect pipe for gas has changed.

MSH15NN2 - ➔ MSH15TN ­MSH17NN2 - ➔ MSH17TN -

1. Remote controller has changed.

MUH09NW2 - ➔ MUH09TW -

1. Outdoor unit has changed.

MUH12NN2 - ➔ MUH12TN -

1. Outdoor unit has changed.

MUH15NN2 - ➔ MUH15TN -

1. Only model name has changed.

U1U1

U1U1

U1U1

U1U1

U1U1

U1U1

U1U1

MUH17NN2 - ➔ MUH17TN -

1. Valve type has changed (Size for connecting pipe is the same).

MXZ30TN

1. New model.

U1U1

5

MXZ30TN ➔ MXZ30TN2

1. Noise filter P.C. board has changed to improve the capacity for protecting the inverter-controlled circuit when the
voltage higher than the rated one is aupplied with the inverter-controlled circuit.

2. Noise filter P.C. board for “MXZ30TN” and “MXZ30TN2” are not interchangeable.

3. Service parts have been changed as follows according to above change;

•The value of R(resistor)has changed. 10Ω ➔ 20Ω

•TB5(terminal block) has been removed.

MUH12TN - ➔ MUH12TN ­MUH15TN - ➔ MUH15TN -

U2U1

U2U1

1. Outdoor haet exchanger has changed.

Outdoor haet exchanger for “TN - ” and “TN - ” are not interchangeable.

U2U1

6

3

Installation plate
Installation plate fixing screw 4 x 25 mm(0.16 x 0.98 in.)
Remote controller mounting hardware
Fixing screw for 3 3.5 x 16 mm(0.14 x 0.63 in.) (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)

1
5
1
2
2
1
1

1
2
3
4
5
6
7

MSH12TN
MSH15TN
MSH17TN

MSH09TW MSH09TW -

U1

1
6
1
2
2
1
1

MSH12TN

-

MSH15TN

-

MSH17TN

-

U1

U1

U1

PART NAMES AND FUNCTIONS

INDOOR UNIT

MSH09TW MSH09TW -

Deodorizing filter(option)
(gray sponge type)

Air cleaning filter(option)
(white bellows type)

Front panel

Air filter

Vertical vanes

Operation section

(When the grille is opened)

MSH09TW MSH09TW -

U1

U1

Grille

MSH12TN
MSH15TN
MSH17TN

MSH12TN ­MSH15TN ­MSH17TN -

U1
U1
U1

Air inlet

Remote control
receiving section

Model indication

Model indication

Horizontal vane

Remote controller

MSH09TW MSH09TW -

U1

Emergency operation switch

MSH12TN MSH12TN ­MSH15TN MSH15TN ­MSH17TN MSH17TN -

U1
U1
U1

Emergency operation switch

ACCESSORIES

MSH12TN MSH12TN ­MSH15TN MSH15TN ­MSH17TN MSH17TN -

7

U1
U1
U1

Operation indicator lamp

Receiving section

Air inlet

Piping

Drain hose

Air outlet

Drain outlet

(back and side)

OUTDOOR UNIT

Air inlet

Air outlet

(back and side)

Model indication

MUH09TW MUH09TW ­MUH12TN MUH12TN -

MUH12TN -

MXZ30TN MXZ30TN2

U1

U1

U2

MUH15TN

MUH15TN ­MUH15TN -

U1

MUH17TN MUH17TN -

U2

U1

8

REMOTE CONTROLLER

ON/OFF

TOO

COOL

PM

AM

TOO

WARM

ON/OFF

FAN

TOO

WARM

TOO

COOL

VANE

MODE

STOP

START

HR.

MIN.

I FEEL

COOL

HEAT

DRY

PM

CLOCK

AM

RESET CLOCK

Open the front lid.

Signal transmitting section

Operation display section

OPERATE /STOP

(ON /OFF)button

TEMPERATURE buttons

OPERATION SELECT button

FAN SPEED CONTROL button

OFF-TIMER button

HR. button

MIN. button

(TIME SET button)

ON-TIMER button

RESET button

VANE CONTROL button

CLOCK SET button

MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW ­MSH12TN ­MSH15TN ­MSH17TN -

U1
U1
U1

U1

9

4

09

12

15

17

09+09

09+12

09+15

09+17

12+12

09+09+09

09+09+12

90

90

90

90

90

90

90

90

90

90

90

4.0

4.9

4.9

8.6

8.6

8.9

8.9

10.5

10.6

13.6

14.9

4.5

5.4

5.4

9.5

9.5

9.9

9.9

11.6

11.7

15.1

16.4

–

–

–

–

–

–

–

–

–

8,800

13,660

8,800

(4,160~9,210)

12,900

(5,600~15,350)

14,600

(5,600~17,010)

16,200

(6,470~18,720)

17,600

(5,470~18,680)

21,700

(6,240~22,760)

23,400

(6,240~24,030)

25,000

(6,220~27,170)

25,800

(6,300~27,900)

26,400

(9,740~29,150)

28,400

(9,940~30,500)

1,030

(510~1,280)

1,250

(510~1,680)

1,250

(510~1,780)

2,200

(500~2,620)

2,200

(550~3,230)

2,280

(540~3,270)

2,280

(540~3,430)

2,680

(550~4,000)

2,700

(540~4,100)

3,500

(700~4,500)

3,800

(810~4,610)

–

–

–

–

8,800

12,900

14,600

16,200

12,900

8,800

7,370

8,800

12,900

14,600

16,200

8,800

8,800

8,800

8,800

12,900

8,800

7,370

Indoor units
combination

Unit A Unit B Unit C

Cooling capacity (BTU/h)

Total

Outdoor unit

power consumption

(W)

Current

(A)

Power

factor

(%)

208V 230V

NOTE: Electrical data is for outdoor unit only.

MXZ30TN MXZ30TN2

09

12

15

17

09+09

09+12

09+15

09+17

12+12

09+09+09

09+09+12

90

90

90

90

90

90

90

90

90

90

90

4.3

4.7

5.5

6.3

7.6

8.6

9.4

10.6

9.9

10.6

11.0

4.8

5.2

6.1

6.9

8.4

9.6

10.4

11.7

10.9

11.8

12.1

–

–

–

–

–

–

–

–

–

9,530

12,960

10,500

(5,790~16,950)

13,500

(6,420~22,400)

14,800

(6,470~23,180)

17,200

(6,520~23,550)

21,000

(6,520~26,900)

24,000

(6,730~30,000)

25,300

(7,490~32,240)

27,700

(8,140~37,100)

27,000

(7,660~36,890)

28,590

(8,900~37,500)

28,600

(9,040~38,000)

1,100

(560~1,990)

1,200

(560~2,340)

1,400

(570~2,480)

1,600

(600~2,710)

1,950

(620~2,900)

2,210

(640~3,130)

2,400

(640~3,360)

2,700

(690~3,900)

2,520

(650~3,850)

2,720

(710~3,920)

2,800

(710~3,970)

–

–

–

–

10,500

13,500

14,800

17,200

13,500

9,530

7,820

10,500

13,500

14,800

17,200

10,500

10,500

10,500

10,500

13,500

9,530

7,820

Indoor units
combination

Unit A Unit B Unit C

Heating capacity (BTU/h)

Total

Outdoor unit

power consumption

(W)

Current

(A)

Power

factor

(%)

208V 230V

INDOOR UNITS COMBINATION

10

5

Item

Model

MSH09TW -

Capacity

Power
consumption

EER [SEER]
HSPF IV(V)
COP
INDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)/ Disconnect switch
Min. circuit ampacity
Fan motor
Auxiliary heater

Airflow Low—Med.—High
Moisture removal

Sound level Low-Med.-High
Cond. drain connection O.D.

Dimensions
Weight

OUTDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor

Compressor

Refrigerant control
Sound level
Defrost method

Dimensions
Weight

REMOTE CONTROLLER
Control voltage (by built-in transformer)
REFRIGERANT PIPING
Pipe size
(Min. wall thickness)

Connection method
Between the indoor

& outdoor units
Refrigerant charge (R22)
Refrigerating oil (Model)

Btu/h
Btu/h
Btu/h

W
W

V, phase, Hz

A
A

F.L.A

A(kW)

CFM
CFM

pt./h

dB(A)

in.
in.
in.
in.
Ib.

V, phase, Hz

A
A

F.L.A

R.L.A
L.R.A

dB(A)

in.
in.
in.
Ib.

in.
in.

ft.
ft.

lb.

oz.

8,800

10,500

5,300

890
890
820

9.9 [10.0]

6.8 (5.9)

3.46

White

115, 1, 60

15

0.5

0.37
–

198-244-297

173(145)-226(187)-279(233)

2.3

26-31-36

5/8

33-1/2

7-1/2

10-15/16

20

Munsell 5Y 7/1

115, 1, 60

20
16

0.60

RH140WGJT

C-R 0.83 C-S 1.48

12.0

42.0

Capillary tube

47

Reverse cycle

30-23/32

10-1/32

21-1/4

82

Wireless type

12V DC

Not supplied (optional parts)

1/4 (0.0265)
3/8 (0.0285)

Flared

Flared
Max. 25
Max. 49

2 Ib. 3 oz.

9.3 (MS56)

❈1 ❈3

❈1

❈1
❈2

❈1

❈1
❈2

Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating

MSH09TW

MSH09TW - MSH09TW

U1

U1

MUH09TW - MUH09TW

U1

HEAT Dry
COOL Dry(Wet)

W
D
H

Model
Winding resistance (at 68˚F) Ω

W
D
H

Liquid
Gas
Indoor
Outdoor
Height difference
Piping length

❈1

Cooling
Heating

Maximum

Minimum

Maximum

Minimum

Indoor intake air temperature

95˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB

Outdoor intake air temperature

115˚FDB

67˚FDB
75˚FDB, 65˚FWB
17˚FDB, 15˚FWB

SPECIFICATIONS

NOTE : Test conditions are based on ARI 210/240.

❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB)
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB

❈3 : (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 82˚FDB, 65˚FWB

Operating Range

(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB

11

Item

Model

MSH12TN

MSH15TN

Capacity

Power
consumption

EER [SEER]
HSPF IV (V)
COP
INDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)/ Disconnect switch
Min. circuit ampacity
Fan motor
Auxiliary heater

Airflow Low—Med.—High
Moisture removal

Sound level Low-Med.-High
Cond. drain connection O.D.

Dimensions
Weight

OUTDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor

Compressor

Refrigerant control
Sound level
Defrost method

Dimensions
Weight

REMOTE CONTROLLER
Control voltage (by built-in transformer)
REFRIGERANT PIPING
Pipe size
(Min. wall thickness)

Connection method
Between the indoor

& outdoor units
Refrigerant charge (R22)
Refrigerating oil (Model)

Btu/h
Btu/h
Btu/h

W
W

V, phase, Hz

A
A

F.L.A

A(kW)

CFM
CFM

pt./h

dB(A)

in.
in.
in.
in.
Ib.

V, phase, Hz

A
A

F.L.A

R.L.A
L.R.A

dB(A)

in.
in.
in.
Ib.

in.
in.

ft.
ft.

lb.

oz.

12,600/12,900
13,000/13,500

6,800/7,000
1,280/1,310
1,180/1,250
1,110/1,140

9.8/9.8[10.2/10.2]

3.23/3.17

311-339-388

3.3

15

0.42

RH189NHDT

49

30-23/32

10-1/32

21-1/4

86

1/2 (0.0285)

2 Ib. 12 oz.

6.8/6.8 (5.9/5.9)

White

115, 1, 60

15

0.6

0.43
–

360-395-452

36-39-42

5/8

39-15/16

7-1/2

12-5/8

31

Munsell 5Y7/1
208/230, 1, 60

14

C-R 1.68 C-S 2.78

10.0

35.0

Capillary tube
Reverse cycle

Wireless type

12V DC

Not supplied (optional parts)

1/4 (0.0265)

Flared

Flared
Max. 25
Max. 50

16.1 (MS56)

14,300/14,600
14,500/14,800

8,700/8,900
1,350/1,380
1,250/1,300
1,210/1,240

10.6/10.6 [10.7/10.7]

3.40/3.34

293-321-367

4.7

20

0.52

RH207NHDT

53

33-7/16
11-7/16

23-13/16

99

5/8 (0.0315)

3 lb. 3 oz.

❈1 ❈3

❈1

❈1
❈2

❈1

❈1
❈2

Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating

(208/230V)
(208/230V)
(208/230V)
(208/230V)
(208/230V)
(208/230V)
(208/230V)
(208/230V)
(208/230V)

MSH12TN -

MSH15TN -

MSH12TN

MSH12TN -

U1

MSH15TN

MSH15TN -

U1

U1

MUH12TN

MUH12TN -

U1 U2

MUH15TN

MUH15TN -

U1 U2

U1

Dry
Wet

W
D
H

Model
Winding resistance (at 68˚F) Ω

W
D
H

Liquid
Gas
Indoor
Outdoor
Height difference
Piping length

Cooling
Heating

Maximum

Minimum

Maximum

Minimum

Indoor intake air temperature

95˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB

Outdoor intake air temperature

115˚FDB

67˚FDB
75˚FDB, 65˚FWB
17˚FDB, 15˚FWB

NOTE : Test conditions are based on ARI 210/240.

❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB)
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB

❈3 : (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 82˚FDB, 65˚FWB

Operating Range

(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB

12

Item Model

❈1

Capacity

Power
consumption

❈1 ❈3

EER [SEER]
HSPF IV (V)
COP

Cooling
Heating 47
Heating 17
Cooling

❈1

Heating 47
Heating 17
Cooling
Heating
Heating

(208/230V)

❈1

(208/230V)

❈2

(208/230V)
(208/230V)

❈1

(208/230V)

❈2

(208/230V)
(208/230V)
(208/230V)
(208/230V)

Btu/h
Btu/h
Btu/h

INDOOR UNIT MODEL

W
W

MSH17TN

MSH17TN MSH17TN ­External finish
Power supply
Max. fuse size (time delay)/ Disconnect switch
Min. circuit ampacity
Fan motor
Auxiliary heater

Airflow Low—Med.—High

Dry

Wet
Moisture removal
Sound level Low-Med.-High
Cond. drain connection O.D.

W
Dimensions

D

H
Weight
OUTDOOR UNIT MODEL

V, phase, Hz

A
A

F.L.A

A(kW)

CFM
CFM

pt./h

dB(A)

in.
in.
in.
in.
lb.

MUH17TN MUH17TN ­External finish
Power supply
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor

V, phase, Hz

A
A

F.L.A

Model

Compressor

Winding resistance (at 68˚F) Ω

R.L.A

L.R.A
Refrigerant control
Sound level

dB(A)

Defrost method

in.
in.
in.
lb.

Dimensions
Weight

W
D
H

REMOTE CONTROLLER
Control voltage (by built-in transformer)
REFRIGERANT PIPING
Pipe size
(Min. wall thickness)

Connection method
Between the indoor

& outdoor units

Liquid
Gas
Indoor
Outdoor
Height difference

Piping length
Refrigerant charge (R22)
Refrigerating oil (Model)

NOTE : Test conditions are based on ARI 210/240.

❈1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB)
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB

❈3 : (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 82˚FDB, 65˚FWB

(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB

Operating Range

Cooling
Heating

Maximum

Minimum

Maximum

Minimum

in.
in.

ft.
ft.

lb.

oz.

Indoor intake air temperature

95˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB

13

MSH17TN -

16,000/16,200
16,800/17,200
10,100/10,300

1,560/1,580
1,500/1,570
1,410/1,510

10.3/10.3 (10.4/10.4)

6.8/6.8 (5.9/5.9)

3.28/3.21
White

115, 1, 60

15

0.7

0.51
–

406-441-491
342-371-413

5.1

40-43-45

5/8

39-15/16

7-1/2

12-5/8

31

Munsell 5Y 7/1

208/230, 1, 60

20
15

0.75

RH231NHDT

C-R 1.65 C-S2.67

11.0

38.0

Capillary tube

53

Reverse cycle

34-1/4
11-5/8
33-1/2

128

Wireless type

12V DC

Not supplied (optional parts)

1/4 (0.0265)
5/8 (0.0315)

Flared

Flared
Max. 25
Max. 50

4lb. 14oz.

16.1 (MS56)

Outdoor intake air temperature

115˚FDB

67˚FDB
75˚FDB, 65˚FWB
17˚FDB, 15˚FWB

U1

U1

U1

Indoor
unit

w Max. Height
difference 25ft.

Outdoor unit

Refrigerant Piping

Max.length

A

w Height difference should be within
25ft. regardless of which unit,
indoor or outdoor position is high.

Outside

diameter

Minimum

Wall

thickness

Outside

diameter

Minimum

Wall

thickness

MSH09TW
MUH09TW

MSH12TN
MUH12TN

MSH15TN
MUH15TN

MSH17TN
MUH17TN

MSH09TW­MUH09TW-

MSH12TN­MUH12TN­MUH12TN-

MSH15TN­MUH15TN­MUH15TN-

MSH17TN­MUH17TN-

Additional piping

Max. length : ft.

A

50

Gas

Piping size : in. Length of connecting pipe : in.

Liquid

Indoor unit

Outdoor unit

Model

U1
U1

U1
U1
U2

U1
U1
U2

U1
U1

Gas :

Liquid :00

Gas :

Liquid :

16-15/16
19-11/16

[ 3/8

[ 1/2







[ 5/8



[ 1/4

0.0285



0.0315

0.0265

MAX. REFRIGERANT PIPING LENGTH

MAX. HEIGHT DIFFERENCE

14

Item Model

Cooling

Heating

Mode

❈1: "A" Cooling Steady State at rated compressor Speed
❈3: "B-2" Cooling Steady State at rated compressor Speed

"B-1" Cooling Steady State at minimum compressor Speed
Low ambient Cooling Steady State at minimum compressor Speed
Intermediate Cooling Steady State At Intermediate compressor Speed

w

❈1: Standard Rating-Heating at rated compressor Speed
❈2: Low temperature Heating at rated compressor Speed

Max temperature Heating at minimum compressor Speed
High temperature Heating at minimum compressor Speed
Frost Accumulation at rated compressor Speed
Frost Accumulation at Intermediate compressor Speed

w

Test

Indoor air condition Outdoor air condition
Dry bulb

Wet bulb

Dry bulb

Wet bulb

80
80
80
80
80
70
70
70
70
70
70

67
67
67
67
67
60
60
60
60
60
60

95
82
82
67
87
47
17
62
47
35
35

(75)
(65)
(65)

(53.5)

(69)

43
15

56.5
43
33
33

w

At Intermediate compressor Speed

=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".

Unit: ˚F

Capacity

Power
consumption

❈1 ❈3

EER [SEER]
HSPF IV (V)
COP

Cooling

❈1

Heating 47
Heating 17
Cooling

❈1

Heating 47
Heating 17
Cooling
Heating
Heating

❈1
❈2

❈1
❈2

Btu/h
Btu/h
Btu/h

OUTDOOR UNIT MODEL
External finish
Power supply

V, phase, Hz
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor

F.L.A

Model

Compressor

Winding resistance (at 68˚F) Ω

R.L.A

L.R.A
Refrigerant control
Sound level

dB(A)
Defrost method

W

Dimensions

D

H
Weight
REMOTE CONTROLLER
Control voltage (by built-in transformer)
REFRIGERANT PIPING
Pipe size
(Min. wall thickness)

Connection method
Between the indoor

& outdoor units

Liquid

Gas

Indoor

Outdoor

Height difference

Piping length (a+b+c)
Refrigerant charge (R22)
Refrigerating oil (Model)

W
W

in.
in.
in.
lb.

in.
in.

ft.
ft.

lb.

oz.

Triple-Unit Double-Unit Single-Unit

28,400/(9,940~30,500)
28,600/(9,040~38,000)

(18,100)
3,800/(810~4,610)
2,800/(710~3,970)

(2,310)

11.0

7.5

3.08

MXZ30TN MXZ30TN2

Munsell 5Y 8/1

208/230, 1, 60
A
A

30
25

1.0

THV-247FBA

U-V 0.61 V-W 0.61 W-U 0.61

15
72

LEV

47

Reverse cycle

35-7/16

12-19/32 (+1+3/8)

35-7/16

176

Wireless type

12V DC

Not supplied (optional parts)

1/4 (0.0265)

A:1/2(0.0285), B,C:3/8(0.0285)

Flared
Flared

Max. 33

Max. 200

8lb. 10oz.

26.7 (MS56)

NOTE : Test conditions are based on ARI 210/240.

15

a

b

c

Outdoor
unit

Indoor
units

H

H

H

Liquid {1/4
Gas {3/8
Liquid {1/4
Gas {1/2
Liquid {1/4
Gas {5/8
Liquid {1/4
Gas {3/8
Liquid {1/4
Gas {1/2
Liquid {1/4
Gas {5/8

Use a different-diameter pipe of the option
MAC-455JP ({1/2 ➔ {3/8)

Use a different-diameter pipe of the option
MAC-456JP ({1/2 ➔ {5/8)

Indoor unit can be connected directly

Indoor unit can be connected directly

Use a different-diameter pipe of the option
MAC-454JP ({3/8 ➔ {1/2)

It is not possible to connect

09

12

15/17

09

12

15/17

Outdoor unit

A

Liquid {1/4

Gas {1/2

B, C

Liquid {1/4

Gas {3/8

Indoor unit Connection method

Cooling
Heating

Maximum

Minimum

Maximum

Minimum

Indoor intake air temperature

95˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB

Outdoor intake air temperature

115˚FDB

67˚FDB
75˚FDB, 65˚FWB
17˚FDB, 15˚FWB

Operating Range MXZ30TN MXZ30TN2

MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION

MXZ30TN MXZ30TN2

Piping length each indoor unit (a, b, c) 82ft. MAX.
Total piping length (a+b+c) 200ft. MAX.
Height difference between units (H) 33ft. MAX.
Bending point for each unit 25 MAX.
Total bending point 60 MAX.

❋It does not matter which unit is higher.

● Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes,refer to the

tables below.

● When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.
For further information on Different-diameter pipe,see page 128.

Indoor unit

class Pipe diameter

09

12

15/17

Liquid 1/4 Liquid 1/4

Gas 3/8 Gas 3/8

Liquid 1/4 Liquid 1/4

Gas 1/2 Gas 1/2

Liquid 1/4 Liquid 1/4

Gas 5/8 Gas 5/8

Extension pipe diameter

Outdoor unit union diameter

For

Indoor unit A

Indoor unit B

Indoor unit C

Liquid 1/4

Gas 1/2

Liquid 1/4

Gas 3/8

Liquid 1/4

Gas 3/8

Unit : inch

● Please connect the indoor unit and the outdoor unit as shown in the table below.

16

6

Model

Indoor air Outdoor intake air DB temperature(˚F

)

71
67
63
71
67
63
71
67
63

TC

15.8

15.0

14.1

17.9

16.9

15.9

19.8

18.8

17.7

SHC

9.1

10.6

11.9

9.2

11.0

12.5

10.1

12.0

13.7

TPC

1.17

1.10

1.05

1.23

1.16

1.10

1.41

1.33

1.26

TC

14.8

13.9

13.0

16.7

15.8

14.7

18.5

17.5

16.4

SHC

8.5

9.9

11.0

8.6

10.2

11.6

9.4

11.2

12.7

TPC

1.28

1.21

1.16

1.35

1.28

1.22

1.54

1.46

1.40

TC

13.9

12.9

12.1

15.7

14.6

13.7

17.4

16.2

15.2

SHC

8.0

9.2

10.2

8.1

9.5

10.8

8.8

10.4

11.8

TPC

1.38

1.31

1.25

1.45

1.38

1.32

1.66

1.58

1.51

TC

12.9

12.0

11.0

14.6

13.6

12.5

16.2

15.1

13.9

SHC

7.4

8.5

9.3

7.5

8.8

9.8

8.2

9.6

10.7

TPC

1.45

1.39

1.34

1.52

1.46

1.41

1.75

1.67

1.61

TC

11.9

11.0

10.1

13.4

12.5

11.4

14.9

13.9

12.6

SHC

6.8

7.8

8.5

6.9

8.1

8.9

7.6

8.9

9.8

TPC

1.51

1.45

1.39

1.59

1.53

1.46

1.82

1.75

1.67

IWB

(˚F)

75 85 95 105 115

MSH12TN
MSH12TN -

MSH15TN
MSH15TN -

MSH17TN
MSH17TN -

NOTE 1. IWB : Intake air wet-bulb temperature
TC : Total Capacity (x10

3

Btu/h), SHC : Sensible Heat Capacity (x10

3

Btu/h)

TPC : Total Power Consumption (kW)

2. SHC is based on 80˚F of indoor intake air DB temperature.

U1

U1

U1

(230V)

DATA

MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW ­MSH12TN ­MSH15TN ­MSH17TN -

6-1. PERFORMANCE DATA

1) COOLING CAPACITY

(115V)

Indoor air Outdoor intake air DB temperature(˚F

MSH09TW
MSH09TW -

(208V)

MSH12TN
MSH12TN -

MSH15TN
MSH15TN -

MSH17TN
MSH17TN -

Model

U1

Model

U1

U1

U1

IWB

(˚F)

71
67
63

Indoor air Outdoor intake air DB temperature(˚F

IWB

(˚F)

71
67
63
71
67
63
71
67
63

U1

MUH09TW

U1

MUH12TN

U1

MUH15TN

U1

MUH17TN

75 85 95 105 115

TC

SHC

TPC

10.8

6.1

0.79

10.2

7.1

0.75

9.6

8.0

0.71

75 85 95 105 115

TC

SHC

TPC

15.4

8.9

1.14

14.6

10.4

1.08

13.7

11.6

1.02

17.5

9.1

1.20

16.6

10.8

1.13

15.6

12.2

1.08

19.6

9.9

1.39

18.6

11.9

1.31

17.4

13.5

1.25

MUH09TW ­MUH12TN - MUH12TN ­MUH15TN - MUH15TN ­MUH17TN -

TC

SHC

10.1

5.7

9.5

6.7

8.9

7.4

TC

SHC

14.4

8.3

13.6

9.7

12.7

10.7

16.4

8.5

15.4

10.0

14.4

11.3

18.3

9.3

17.3

11.1

16.2

12.5

TPC

0.87

0.82

0.79

TPC

1.25

1.18

1.13

1.32

1.25

1.19

1.52

1.44

1.38

U1

U1

TC

9.5

8.8

8.3

TC

13.5

12.6

11.8

15.4

14.3

13.4

17.2

16.0

15.0

SHC

5.4

6.2

6.9

SHC

7.8

8.9

10.0

7.9

9.3

10.5

8.7

10.2

11.6

TPC

0.93

0.89

0.85

TPC

1.34

1.28

1.22

1.42

1.35

1.29

1.64

1.56

1.49

TC

8.8

8.2

7.5

TC

12.6

11.7

10.8

14.3

13.3

12.2

16.0

14.9

13.7

U2U1

U2U1

)

SHC

5.0

5.7

6.3

)

SHC

7.3

8.3

9.1

7.4

8.6

9.6

8.1

9.5

10.6

TPC

0.98

0.94

0.91

TPC

1.41

1.36

1.31

1.49

1.43

1.38

1.72

1.65

1.59

TC

8.1

7.5

6.9

TC

11.6

10.8

9.8

13.2

12.2

11.2

14.7

13.7

12.5

SHC

4.6

5.3

5.7

SHC

6.7

7.6

8.3

6.8

7.9

8.7

7.5

8.8

9.7

TPC

1.02

0.99

0.94

TPC

1.47

1.42

1.36

1.55

1.50

1.43

1.79

1.73

1.65

17

Model

Refrigerant piping length (one way : ft.)

1.0

25 (std.)

0.954

40

0.927

49

MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW­MSH12TN­MSH15TN­MSH17TN-

U1

U1

U1

U1

2) COOLING CAPACITY CORRECTIONS

(230V)

Model

Indoor air Outdoor intake air WB temperature(˚F

)

75
70
65
75
70
65
75
70
65

TC

7.8

8.3

8.5

8.6

9.1

9.3

10.0

10.6

10.8

TPC

0.93

0.90

0.86

0.97

0.94

0.90

1.17

1.13

1.08

TC

9.8

10.1

10.6

10.7

11.1

11.6

12.5

12.9

13.5

TPC

1.09

1.07

1.03

1.14

1.11

1.07

1.37

1.34

1.30

TC

11.7

11.9

12.4

12.8

13.1

13.5

14.9

15.2

15.7

TPC

1.22

1.19

1.16

1.27

1.24

1.20

1.53

1.49

1.45

TC

13.2

13.5

13.9

14.4

14.8

15.2

16.8

17.2

17.7

TPC

1.28

1.25

1.22

1.33

1.30

1.27

1.61

1.57

1.53

TC

13.6

13.9

14.3

14.9

15.2

15.7

17.3

17.7

18.2

TPC

1.30

1.28

1.24

1.35

1.33

1.29

1.63

1.60

1.55

TC

15.4

15.7

16.1

16.9

17.2

17.6

19.6

20.0

20.5

TPC

1.35

1.33

1.30

1.40

1.38

1.35

1.70

1.66

1.63

IDB
(˚F)

15 25 35 43 45 55

MSH12TN
MSH12TN -

U1

MSH15TN
MSH15TN -

U1

MSH17TN
MSH17TN -

U1

NOTE: 1. IDB : Intake air dry-bulb temperature

TC : Total Capacity (x10

3

Btu/h)

TPC : Total Power Consumption (kW)

2. Above data is for heating operation without any frost.

(208V)

Model

Indoor air Outdoor intake air WB temperature(˚F

)

75
70
65
75
70
65
75
70
65

TC

7.5

8.0

8.2

8.4

8.9

9.1

9.7

10.3

10.6

TPC

0.88

0.85

0.81

0.93

0.90

0.86

1.12

1.08

1.04

TC

9.4

9.8

10.2

10.5

10.9

11.4

12.2

12.6

13.2

TPC

1.03

1.01

0.97

1.09

1.07

1.03

1.31

1.28

1.24

TC

11.2

11.5

11.9

12.5

12.8

13.3

14.5

14.9

15.4

TPC

1.15

1.12

1.09

1.22

1.19

1.16

1.46

1.43

1.39

TC

12.7

13.0

13.4

4.1

14.5

14.9

16.4

16.8

17.3

TPC

1.21

1.18

1.15

1.28

1.25

1.22

1.54

1.50

1.46

TC

13.1

13.4

13.8

14.6

14.9

15.4

16.9

17.3

17.8

TPC

1.23

1.20

1.17

1.30

1.28

1.24

1.56

1.53

1.49

TC

14.8

15.1

15.5

16.5

16.9

17.3

19.2

19.6

20.0

TPC

1.27

1.25

1.23

1.35

1.33

1.30

1.62

1.59

1.56

IDB
(˚F)

15 25 35 43 45 55

MSH12TN
MSH12TN -

U1

MSH12TN - U2

MSH15TN
MSH15TN -

U1

MSH15TN - U2

MSH17TN
MSH17TN -

U1

(115V)

Model

Indoor air Outdoor intake air WB temperature(˚F

)

75
70
65

TC

6.1

6.5

6.6

TPC

0.66

0.64

0.61

TC

7.6

7.9

8.2

TPC

0.78

0.76

0.73

TC

9.1

9.3

9.6

TPC

0.87

0.85

0.82

TC

10.2

10.5

10.8

TPC

0.91

0.89

0.87

TC

10.6

10.8

11.1

TPC

0.93

0.91

0.88

TC

12.0

12.2

12.5

TPC

0.96

0.94

0.93

IDB
(˚F)

15 25 35 43 45 55

MSH09TW
MSH09TW -

U1

3) HEATING CAPACITY

18

6-2. PERFORMANCE CURVE

71
67
63

71
67
63

65
70
75

75
70
65

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

Outdoor intake air DB temperature (°F)

Indoor intake air WB temperature (

°F)

Indoor intake air WB temperature (

°F)

Cooling

SHF at rating condition = 0.70

= 233CFM
= 0.23

Airflow

Bypass Factor

12

10

8

6

1.2

65 75 85 95 105 115

0.8

0.6

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

Outdoor intake air WB temperature (°F)

Indoor intake air DB temperature (°F)

Indoor intake air DB temperature (

°F)

Heating

= 297CFM

Airflow

12

14

10

8

6

1.1

1.0

15 25 35 45 55

0.8

0.6

0.7

0.9

1.0

NOTE : The curves shows peformance under 230V AC.

As for under 208V AC, refer to PERFORMANCE DATAon page 17 and 18.

MSH09TW
MUH09TW

MSH09TW ­MUH09TW -

U1

U1

19

MSH12TN

71

67

63

71
67
63

16

14

10

12

2

1

Indoor intake air WB temperature (

°

F)

Indoor intake air WB temperature (

°

F)

65
70
75

75
70
65

20

16

8

12

1.6

0.6

Cooling

SHF at rating condition = 0.71

= 388CFM
= 0.15

Airflow

Bypass Factor

65 75 85 95 105 115

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

Outdoor intake air DB temperature (°F)

Indoor intake air DB temperature (

°

F)

Heating

= 452CFM

Airflow

15 25 35 45 55

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

Outdoor intake air WB temperature (°F)

0.8

1.0

1.2

1.4

Indoor intake air DB temperature (

°

F)

MUH12TN

MSH12TN ­MUH12TN ­MUH12TN -

U1
U1
U2

20

MSH15TN

71
67
63

71
67
63

65
70
75

75
70
65

Indoor intake air WB temperature (

°

F)

Cooling

SHF at rating condition = 0.65

= 367CFM
= 0.22

Airflow

Bypass Factor

65 75 85 95 105 115

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

22

18

14

10

2

Outdoor intake air DB temperature (°F)

Indoor intake air DB temperature (

°

F)

Heating

= 452CFM

Airflow

15 25 35 45 55

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

20

16

8

1.4

0.8

Outdoor intake air WB temperature (°F)

1

12

1.0

1.2

0.6

Indoor intake air DB temperature (

°

F)

Indoor intake air WB temperature (

°

F)

MUH15TN

MSH15TN ­MUH15TN ­MUH15TN -

U1
U1
U2

21

MSH17TN

71
67

63

71
67
63

65
70
75

75
70
65

Indoor intake air WB temperature (

°

F)

Indoor intake air WB temperature (

°

F)

Cooling

SHF at rating condition = 0.64

= 413CFM
= 0.24

Airflow

Bypass Factor

65 75 85 95 105 115

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

24

20

16

12

2

1

Outdoor intake air DB temperature (°F)

Indoor intake air DB temperature (

°

F)

Indoor intake air DB temperature (

°

F)

Heating

= 491CFM

Airflow

15 25 35 45 55

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

20

16

12

8

2.0

1.0

Outdoor intake air WB temperature (°F)

1.2

1.6

1.4

1.8

MUH17TN

MSH17TN ­MUH17TN -

U1
U1

22

6-3. Condensing pressure
MSH09TW MSH09TW -

U1

(Cooling)

(PSIG)

300

Data is based on the condition of indoor humidity 50%.
Air flow should be set to High speed.

280

260

240

220

200

Condensing pressure

180

160

140

68 70 75 80 85 90 95 100 104(°F)

MSH09TW MSH09TW-

Indoor DB temperature (

Outdoor ambient temperature

U1

(Heating)

°F)

Data is based on the condition of outdoor humidity 75%.
Air flow should be set to High speed.
Data is for heating operation without any frost.

86

(PSIG)

80
75

100

70

90

80

70

60

Suction pressure

50

40

68 70 75 80 85 90 95 100 104(°F)

Indoor DB temperature (°F)

Outdoor ambient temperature

86
80

75
70

(PSIG)

310
300
290
280
270
260
250
240
230
220
210
200

Condensing pressure

190
180
170
160
150

5 10152025303540455055606570(°F)

Indoor DB temperature(

Outdoor ambient temperature

°F)

75
70

65

23

(PSIG)

80

70

60

50

40

30

Suction pressure

20

10

5 10152025303540455055606570(°F)

Indoor DB temperature (°F)

Outdoor ambient temperature

75 70 65

MSH12TN MSH12TN­(Cooling)

(PSIG)

320

U1

Data is based on the condition of indoor humidity 50%.
Air flow should be set to High speed.

300

280

260

240

220

Condensing pressure

200

180

160

140

68 70 75 80 85 90 95 100 104(°F)

MSH12TN MSH12TN -

Indoor DB temperature (

Outdoor ambient temperature

U1

(Heating)

°F)

Data is based on the condition of outdoor humidity 75%.
Air flow should be set to High speed.
Data is for heating operation without any frost.

86
80
75
70

(PSIG)

100

90

80

70

Suction pressure

60

50

40

Indoor DB temperature (°F)

68 70 75 80 85 90 95 100 104(°F)

Outdoor ambient temperature

86
80

75
70

(PSIG)

310
300
290
280
270
260
250
240
230
220
210
200

Condensing pressure

190
180
170
160
150

5 10152025303540455055606570(°F)

Indoor DB temperature(°F)

Outdoor ambient temperature

(PSIG)

(PSIG)

80

70

60

75

50

70

40

65

30

Suction pressure

Suction pressure

20

10

24

75 70 65

Indoor DB temperature (°F)

Indoor DB temperature (°F)

10 15 20 25 30 35 40 45 50 55 60 65 70(°F)

5

Outdoor ambient temperature

MSH15TN MSH15TN­(Cooling)

(PSIG)

320

U1

Data is based on the condition of indoor humidity 50%.
Air flow should be set to High speed.

300

280

260

240

220

200

Condensing pressure

180

160

140

68 70 75 80 85 90 95 100 104( F)

MSH15TN MSH15TN­(Heating)

Indoor DB temperature (°F)

Outdoor ambient temperature

U1

Data is based on the condition of outdoor humidity 75%.
Air flow should be set to High speed.
Data is for heating operation without any frost.

86
80
75
70

(PSIG)

100

90

80

70

60

Suction pressure

50

40

68 70 75 80 85 90 95 100 104( F)

Indoor DB temperature (°F)

Outdoor ambient temperature

86
80

75
70

(PSIG)

290
280
270
260
250
240
230

220
210
200

Condensing pressure

190
180
170

160
150

510152025303540455055606570( F)

Indoor DB temperature(

Outdoor ambient temperature

°F)

75
70

65

(PSIG)

25

80

70

60

50

40

30

Suction pressure

20

10

510152025303540455055606570( F)

Indoor DB temperature (

Outdoor ambient temperature

°F)

75
70
65

MSH17TN MSH17TN­(Cooling)

(PSIG)

320

U1

Data is based on the condition of indoor humidity 50%.
Air flow should be set to High speed.

300

280

260

240

220

Indoor DB temperature (°F)

200

Condensing pressure

180

160

140

68 70 75 80 85 90 95 100 104( F)

MSH17TN MSH17TN­(Heating)

Outdoor ambient temperature

U1

Data is based on the condition of outdoor humidity 75%.
Air flow should be set to High speed.
Data is for heating operation without any frost.

86
80
75
70

(PSIG)

100

90

80

70

60

Suction pressure

50

40

68 70 75 80 85 90 95 100 104( F)

Indoor DB temperature (°F)

Outdoor ambient temperature

86
80
75

70

(PSIG)

300
290
280
270
260
250
240
230

220
210
200

Condensing pressure

190
180
170
160
150

510152025303540455055606570( F)

Indoor DB temperature(

Outdoor ambient temperature

°F)

75
70

65

(PSIG)

26

80

70

60

50

40

30

Section pressure

20

10

510152025303540455055606570( F)

Indoor DB temperature (

Outdoor ambient temperature

°F)

75
70
65

6-4. STANDARD OPERATION DATA

MSH09TW MSH09TW - U1

INDOOR UNIT

115V 60Hz 1[, 2 wires

•Both wirings can be applied to all MODELS.

OUTDOOR UNIT

115V
60Hz 1[, 2 wires

SIGNAL WIRE
2 wires 12V DC

INDOOR UNIT

OUTDOOR UNIT

115V
60Hz 1[, 2 wires

SIGNAL WIRE
2 wires 12V DC

115V 60Hz 1[,
2 wires

Disconnect
switch

Model

Item

Capacity

Total

Electrical
circuit

Refrigerant
circuit

Indoor
unit

Outdoor
unit

SHF
Input
Indoor unit
Power supply (V, phase, Hz)
Input
Fan motor current
Aux. heater current
Outdoor unit
Power supply (V, phase, Hz)
Input
Comp. current
Fan motor current
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp
Ref. pipe length
Refrigerant charge (R22)

Intake air temperature

Discharge air temperature

Fan speed (High)
Airflow (High)

Intake air temperature

Fan speed
Airflow

DB

WB

DB

WB

DB

WB

Unit

Btu / h

—

kW

kW

A
A

kW

A

A
PSIG
PSIG

˚F
˚F
˚F
˚F

ft.
—
˚F
˚F
˚F
˚F

rpm

CFM

˚F
˚F

rpm

CFM

Cooling

8,800

0.70

235

70
179
113

52
157

80

67

59

57
950

233(Wet)

95

–

MSH09TW MSH09TW -

0.89

MSH09TW MSH09TW -

115,1,60

0.035

0.34
–

MUH09TW MUH09TW -

115, 1, 60

0.855

6.91

0.59

25

2 lb. 3 oz.

640
985

U1

Heating

10,500

–

U1

U1

223

60
171
110

35
146

70

60
100

–

1,000

297(Dry)

47

43

POWER SUPPLY

27

✻ Control voltage

Power supply voltage to serial
signal circuit is 12V DC.

11

Peak voltage between

­and 33+ on in-out terminal
block is 12V DC .

Cooling

12,600/12,900

0.71

1.28/1.31

1.233/1.263

5.74/5.21

259

84
194
120

67
177

80

67

57

56

388[Wet]

95

–

Capacity (208/230V)
SHF
Input (208/230V)
Indoor unit
Power supply (V, phase, Hz)
Input
Fan motor current
Aux. heater current
Outdoor unit
Power supply (V, phase, Hz)
Input (208/230V)
Comp. current (208/230V)
Fan motor current
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp
Ref. pipe length
Refrigerant charge (R22)

Intake air temperature

Discharge air temperature

Fan speed (High)
Airflow (High)

Intake air temperature

Fan speed (208/230V)
Airflow (208/230V)

Unit

Btu / h

—

kW

kW

A
A

kW

A

A
PSIG
PSIG

˚F
˚F
˚F
˚F
ft.
—
˚F
˚F
˚F
˚F

rpm

CFM

˚F
˚F

rpm

CFM

Cooling

14,300/14,600

0.65

1.35/1.38

1.303/1.333

5.91/5.41

246

80
146
112

58
161

80

67

57

54

367[Wet]

95

–

Heating

14,500/14,800

–

1.25/1.30

1.203/1.253

5.41/5.11

230

57
158
108

33
143

70

60
107

–

452[Dry]

47

43

Heating

13,000/13,500

–

1.18/1.25

1.133/1.203

5.24/5.01

203

58
158
103

36
144

70

60
100

–

452[Dry]

47

43

DB

WB

DB

WB

DB

WB

Item

Model

Total

Electrical
circuit

Refrigerant
circuit

Indoor
unit

Outdoor
unit

MSH12TN MSH12TN -

U1

MSH12TN MSH12TN -

U1

115, 1, 60

0.047

0.41
–

MUH12TN MUH12TN -

U1 U2

208/230, 1, 60

0.36/0.39

25

2 Ib. 12 oz.

1,200

700/740

974/1,034

MSH15TN MSH15TN -

U1

MSH15TN MSH15TN -

U1

115, 1, 60

0.047

0.41
–

MUH15TN MUH15TN -

U1 U2

208/230, 1, 60

0.49

25

3 Ib. 3 oz.

1,200

830/900

1,288/1,394

MSH12/15TN MSH12/15TN - U1

INDOOR UNIT

OUTDOOR UNIT

115V 60Hz 1[, 2wires

208/230V 60Hz 1[,
2 wires

SIGNAL WIRE
2 wires 12V DC

INDOOR UNIT

OUTDOOR UNIT

208/230V 60Hz 1[,
3 wires

115V 60Hz 1[,
2 wires

SIGNAL WIRE
2 wires 12V DC

•Both wirings can be applied to all MODELS.

115V

•Outline of MUH12TN( )
is same as one of MUH09TW.

- U1 , - U2

Disconnect
switch

POWER SUPPLY

28

✻ Control voltage

Power supply voltage to serial
signal circuit is 12V DC.
Peak voltage between 11­and 33+ on in-out terminal
block is 12V DC .

Model

MSH17TN MSH17TN - U1

INDOOR UNIT

OUTDOOR UNIT

115V 60Hz 1[, 2 wires

208/230V 60Hz 1[,
2 wires

SIGNAL WIRE
2 wires 12V DC

INDOOR UNIT

OUTDOOR UNIT

208/230V 60Hz 1[,
3 wires

115V 60Hz 1[,
2wires

SIGNAL WIRE
2 wires 12V DC

•Both wirings can be applied to all MODELS.

115V

Disconnect switch

Item

Capacity (208/230V)

Total

Electrical
circuit

Refrigerant
circuit

SHF
Input (208/230V)
Indoor unit
Power supply (V, phase, Hz)
Input
Fan motor current
Aux. heater current
Outdoor unit
Power supply (V, phase, Hz)
Input (208/230V)
Comp. current (208/230V)
Fan motor current
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp
Ref. pipe length
Refrigerant charge (R22)

Intake air temperature

Indoor
unit

Outdoor
unit

Discharge air temperature

Fan speed (High)
Airflow (High)

Intake air temperature

Fan speed (208/230V)
Airflow (208/230V)

POWER SUPPLY

Unit

Btu / h

—

kW

kW

A
A

kW

A

A
PSIG
PSIG

˚F
˚F
˚F
˚F
ft.
—

DB

WB

DB

WB

DB

WB

˚F
˚F
˚F
˚F

rpm

CFM

˚F
˚F

rpm

CFM

Cooling

16,000/16,200

0.64

1.56/1.58

1.506/1.526

6.69/6.19

243

77
165
113

48
150

80

67

56

54

413[Wet]

95

–

MSH17TN MSH17TN -

MSH17TN MSH17TN -

115,1,60

0.054

0.47
–

MUH17TN MUH17TN -

208/230, 1, 60

0.61

25

4 lb. 14 oz.

1,290

740/800

1,606/1,730

✻ Control voltage

Power supply voltage to serial
signal circuit is 12V DC.
Peak voltage between 11­and 33+ on in-out terminal
block is 12V DC .

U1

Heating

16,800/17,200

–

1.50/1.57

U1

U1

1.446/1.516

6.39/6.09

242

63
162
112

35
144

70

60
109

–

491[Dry]

47

43

29

Capacity
SHF
Input
Outdoor unit
Power supply (V, phase, Hz)
Input
Comp. current
Fan motor current
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp

Ref. pipe length
[Total pipe length for multi-system]

Refrigerant charge (R22)

Intake air temperature

Fan speed (208/230V)
Airflow (208/230V)

Unit

Btu / h

—

kW

kW

A

A
PSIG
PSIG

˚F
˚F
˚F
˚F

ft.

—
˚F
˚F

rpm

CFM

Heating

28,600

–

2.8

2.8

12.3

219

47

169

26

144

47
43

DB
WB

Item

Model

Total

Electrical
circuit

Refrigerant
circuit

Outdoor
unit

Cooling

28,400

–

3.8

3.8

17.1

300

65

194

41

150

95

–

MXZ30TN MXZ30TN2

208/230, 1, 60

0.60

127

82 [197]

8 lb. 10 oz.

630/675

1,764/1,906

MXZ30TN MXZ30TN2

INDOOR UNIT

MXZ30TN
MXZ30TN2

115V 60Hz
1[, 2 wires

208/230V 60Hz 1[,
2 wires

SIGNAL WIRE
2 wires 12V DC

INDOOR UNIT

INDOOR UNIT

115V 60Hz
1[, 2 wires

115V 60Hz
1[, 2 wires

POWER SUPPLY

30

✻ Control voltage

Power supply voltage to serial
signal circuit is 12V DC.
Peak voltage between 11­and 33+ on in-out terminal
block is 12V DC .

6-5. OPERATING RANGE

MUH09TW
MUH12TN

MUH15TN
MUH17TN
MXZ30TN
MXZ30TN2

Indoor unit

Outdoor unit

Rating

115V 60Hz 1[

208/230V 60Hz 1[

Guaranteed Voltage

MSH09TW
MSH12TN
MSH15TN
MSH17TN

Model

MUH09TW­MUH12TN-

MUH12TN­MUH15TN­MUH15TN­MUH17TN-

MSH09TW­MSH12TN­MSH15TN­MSH17TN-

U1

U1

U1

U1

U1

U1

U2

U1

U2

U1

Min. 103V

Max. 127V

115V

Min. 198V Max. 253V

208V

230V

78%

—

w

At Intermediate compressor Speed

=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".

Function

Cooling

Heating

Standard temperature

Maximum temperature

Minimum temperature

Maximum humidity

Standard temperature

Maximum temperature

Minimum temperature

DB (˚F)

80
95
67

70
80
70

WB (˚F)

67
71
57

60
67
60

Indoor

DB (˚F)

95

115

67

47
75
17

WB (˚F)

—
—
—

43
65
15

Outdoor

Condition

Intake air
temperature

Function

Cooling

Heating

"A" Cooling Steady State
at rated compressor Speed

"B-2" Cooling Steady State
at rated compressor Speed

"B-1" Cooling Steady State
at minimum compressor Speed

Low ambient Cooling Steady State
at minimum compressor Speed

Intermediate Cooling Steady State
At Intermediate compressor Speedw

Standard Rating-Heating
at rated compressor Speed

Low temperature Heating
at rated compressor Speed

Max temperature Heating
at minimum compressor Speed

High temperature Heating
at minimum compressor Speed

Frost Accumulation
at rated compressor Speed

Frost Accumulation
at Intermediate compressor Speedw

DB (˚F)

80
80
80
80
80
70
70
70
70
70
70

WB (˚F)

67
67
67
67
67
60
60
60
60
60
60

Indoor

DB (˚F)

95
82
82
67
87
47
17
62
47
35
35

WB (˚F)

(75)
(65)
(65)

(53.5)

(69)

43
15

56.5
43
33
33

Outdoor

Condition

Intake air
temperature

MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW­MSH12TN­MSH15TN­MSH17TN-

U1
U1
U1
U1

MXZ30TN MXZ30TN2

(1) POWER SUPPLY

(2) OPERATION

31

6-6. OUTLET AIR SPEED AND COVERAGE RANGE

Model

MSH09TW MSH09TW-

MSH12TN MSH12TN-

MSH15TN MSH15TN-

MSH17TN MSH17TN-

U1

U1

U1

U1

Mode

HEAT

COOL

HEAT

COOL

HEAT

COOL

HEAT

COOL

297
279
233
452
452
388
452
452
367
491
491
413

15.8

14.9

12.4

18.2

18.2

15.6

18.2

18.2

14.8

19.7

19.7

16.6

22.3

21.0

17.6

29.2

29.2

25.2

29.2

29.2

23.9

31.7

31.7

26.8

Air flow

(CFM)

Air speed

(ft./sec.)

Coverage
range (ft.)

Function

Dry
Dry

Wet

Dry
Dry

Wet

Dry
Dry

Wet

Dry
Dry

Wet

MSH09TW MSH09TW­MUH09TW MUH09TW­MSH12TN MSH12TN­MUH12TN MUH12TN-

MUH12TN­MSH15TN MSH15TN­MUH15TN MUH15TN-

MUH15TN­MSH17TN MSH17TN­MUH17TN MUH17TN-

Outdoor unit

precharged

(up to 25ft.)

2 lb. 3 oz.

2 lb. 12 oz.

3 lb. 3 oz.

4 lb. 14 oz.

25ft.

0

30ft.

2.68

35ft.

5.36

Refrigerant piping length (one way)

40ft.

8.04

45ft.

10.72

49ft.

12.86

Model

U1
U1

U1

U1

U2

U1

U1

U2
U1
U1

6-7. ADDITIONAL REFRIGERANT CHARGE (R22(oz.))

● The air coverage range is the figure up
to the position where the air speed is
1 ft./sec., when air is blown out
horizontally from the unit properly at the
High speed position.
The coverage range should be used only
as a general guideline since it varies
according to the size of the room and
furniture arranged inside the room.

W MXZ30TN and MXZ30TN2 do not have the necessity of additional refrigerant.

32

MXZ30TN MXZ30TN2

Wet-and dry-bulb
thermometers

Wet-and dry-bulb
thermometers

09 class

(32Hz)

51.4

49.8

48.2

46.6

45.0

43.5

49.8

48.4

46.8

45.3

44.1

42.6

51.4

49.6

48.0

46.6

45.0

43.5

47.3

46.0

44.8

43.7
424

41.4

18 class

(73Hz)

15 class

(73Hz)

12 class

(46Hz)

80 85 90 95 100 105 110

80 85 90 95 100 105 110

79

75

72
68
64

79

75

72
68

64

Indoor unit class

(Inverter output

frequency)

Indoor air WB temperature

difference (degree)

72.0

68.7

65.7

62.6

59.5

56.5

53.4

50.4

74.7

71.4

68.2

64.8

61.5

58.3

55.0

51.6

86.2

82.0

77.9

73.8

69.6

65.3

61.2

57.8

68.4

65.7

62.8

59.9

57.2

54.3

51.6

48.7

09 class

(36Hz)

12 class

(65Hz)

15 class

(80Hz)

17 class

(80Hz)

14

20

30

40

50

59
68
79

60

14

20

30

40

50

60

59

68

79

Indoor unit class

(Inverter output

frequency)

Indoor air DB temperature

difference (degree)

The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions,
since operating conditions vary according to the areas where these units are installed. The following information has been pro­vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.

(1) GUARANTEED VOLTAGE

198 ~ 264V

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature : °FWB
(2) Indoor outlet air wet-bulb temperature : °FWB
(3) Outdoor intake air dry-bulb temperature : °FDB
(4) Total input: W
(5) Indoor intake air dry-bulb temperature : °FDB
(6) Outdoor intake air wet-bulb temperature : °FWB
(7) Total input : W
Indoor air wet/dry-bulb temperature difference on the left side of the chart on this page shows the difference between the
indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.

Cooling

}

Heating

}

How to measure the indoor air wet-bulb/dry-bulb temperature difference

1. Attach at least 2 sets of wet-and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets
of wet-and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air
speed is high.

2. Attach at least 2 sets of wet-and dry-bulb thermometers to the outdoor air intake.
Cover the thermometers to prevent direct rays of the sun.

3. Check that the air filter is cleaned.

4. Open windows and doors of room.

5. Press the EMERGENCY OPERATION switch once(twice) to start the EMERGENCY COOL(HEAT) MODE.

6. Compressor starts running at 33Hz (COOL) or 45Hz (HEAT). The frequency at each operation mode is fixed.

7. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.

8. 10 minutes later, measure temperature again and check that the temperature does not change.

INDOOR UNIT OUTDOOR UNIT

6-8. CAPACITY AND THE INPUT CURVES

33

6-9. Capacity and input correction by means of inverter output frequency

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

Frequency

<COOL>Total input

Hz

<HEAT>Capacity

Frequency

Hz

Frequency

<HEAT>Total input

Hz

<COOL>Capacity

Frequency

Hz

Frequency

<COOL>Total input

Hz

<HEAT>Capacity

Frequency

Hz

Frequency

<HEAT>Total input

Hz

<COOL>Capacity

Frequency

Hz

Frequency

<COOL>Total input

Hz

<HEAT>Capacity

Frequency

Hz

Frequency

<HEAT>Total input

Hz

1. 09-class unit in single operation

2. 12-class unit in single operation

3. 15-class unit in single operation

<COOL>Capacity

Frequency

Hz

Frequency

<COOL>Total input

Hz

<HEAT>Capacity

Frequency

Hz

Frequency

<HEAT>Total input

Hz

4. 17-class unit in single operation

(OUTDOOR UNIT:MXZ30TN MXZ30TN2)

34

6-10. Outdoor low pressure and outdoor unit current

65 70 75 80 85 90 95 100 105 110 115

50

60

70

80

90

100

Ambient temperature(°F)

(°F)

86
80

75
70

Indoor DB temperature(°F)

65 70 75 80 85 90 95 100 105 110 115

0.0

1.0

2.0

3.0

4.0

5.0

6.0

Ambient temperature(°F)

(°F)

15 20 25 30 35 40 45 50 55 60 65 70 75

4.0

5.0

6.0

7.0

8.0

9.0

Outdoor ambient temperature(°F)

Outdoor low pressure

Outdoor unit current (A)

Outdoor unit current (A)

45Hz

(PSIG)

33Hz

33Hz

65

75

70

86
80
75
70

Indoor DB temperature(°F)

Indoor DB temperature(°F)

1. 09-class unit in single operation (OUTDOOR UNIT : MXZ30TN MXZ30TN2)

(1) COOL operation

1Data is based on the condition of indoor

humidity 50%

2Air flow speed : High
3Inverter output frequency : 33Hz

(2) HEAT operation

①

Data is based on the condition of outdoor
humidity 75%.

➁

Set air flow to High speed.

➂

Inverter output frequency is 45Hz.

<How to work fixed-frequency operation>

1.Set emergency switch to COOL or HEAT.The switch is locat­ed on indoor unit.

2.Press emergency run ON/OFF button.

3.Compressor starts running at 33Hz (COOL) or 45Hz (HEAT).

4.Indoor fan runs at High speed and continues for 30 minutes.

5.To cancel this operation,press emergency run ON/OFF button
or any button on remote controller.

35

2. 12-class unit in single operation (OUTDOOR UNIT : MXZ30TN MXZ30TN2)

65 70 75 80 85 90 95 100 105 110 115

65

70

75

80

85

90

95

100

Ambient temperature(°F)

(°F)

86

80

75

70

86
80
75
70

15 20 25 30 35 40 45 50 55 60 65 70 75

4.0

5.0

6.0

7.0

8.0

9.0

Outdoor ambient temperature(°F)

65 70 75 80 85 90 95 100 105 110 115

0.0

1.0

2.0

3.0

4.0

5.0

6.0

Ambient temperature(°F)

(°F)

(PSIG)

Outdoor low pressure

Outdoor unit current (A)

Outdoor unit current (A)

45Hz

33Hz

33Hz

65

70

75

Indoor DB temperature(°F)

Indoor DB temperature(°F)

Indoor DB temperature(°F)

(1) COOL operation

1Data is based on the condition of indoor

humidity 50%

2Air flow speed : High
3Inverter output frequency : 33Hz

<How to work fixed-frequency operation>

1.Set emergency switch to COOL or HEAT.The switch is locat­ed on indoor unit.

2.Press emergency run ON/OFF button.

3.Compressor starts running at 33Hz (COOL) or 45Hz (HEAT).

4.Indoor fan runs at High speed and continues for 30 minutes.

5.To cancel this operation,press emergency run ON/OFF button
or any button on remote controller.

(2) HEAT operation

①

Data is based on the condition of outdoor
humidity 75%.

➁

Set air flow to High speed.

➂

Inverter output frequency is 45Hz.

36

4. 15-class unit in single operation (OUTDOOR UNIT : MXZ30TN MXZ30TN2)

65 70 75 80 85 90 95 100 105 110 115

65

70

75

80

85

90

95

100

Ambient temperature(°F)

(°F)

86

80

75

70

86
80
75
70

15 20 25 30 35 40 45 50 55 60 65 70 75

4.0

5.0

6.0

7.0

8.0

9.0

Outdoor ambient temperature(°F)

65 70 75 80 85 90 95 100 105 110 115

0.0

1.0

2.0

3.0

4.0

5.0

6.0

Ambient temperature(°F)

(°F)

(PSIG)

Outdoor low pressure

Outdoor unit current (A)

Outdoor unit current (A)

45Hz

33Hz

33Hz

65

70

75

Indoor DB temperature(°F)

Indoor DB temperature(°F)

Indoor DB temperature(°F)

(1) COOL operation

1Data is based on the condition of indoor

humidity 50%

➁

Air flow speed : High

➂

Inverter output frequency : 33Hz

<How to work fixed-frequency operation>

1.Set emergency switch to COOL or HEAT.The switch is locat­ed on indoor unit.

2.Press emergency run ON/OFF button.

3.Compressor starts running at 33Hz (COOL) or 45Hz (HEAT).

4.Indoor fan runs at High speed.

5.To cancel this operation,press emergency run ON/OFF button
or any button on remote controller.

(2) HEAT operation

①

Data is based on the condition of outdoor
humidity 75%

➁

Set air flow to High speed.

➂

Inverter output frequency is 45Hz.

37

5. 17-class unit in single operation (OUTDOOR UNIT : MXZ30TN MXZ30TN2)

65 70 75 80 85 90 95 100 105 110 115

65

70

75

80

85

90

95

100

Ambient temperature(°F)

(°F)

15 20 25 30 35 40 45 50 55 60 65 70 75

4.0

5.0

6.0

7.0

8.0

9.0

Outdoor ambient temperature(°F)

65 70 75 80 85 90 95 100 105 110 115

1.0

2.0

3.0

4.0

5.0

6.0

7.0

Ambient temperature(°F)

(°F)

(PSIG)

Outdoor low pressure

Outdoor unit current (A)

Outdoor unit current (A)

45Hz

33Hz

33Hz

86
80
75
70

75
70
65

Indoor DB temperature(°F)

Indoor DB temperature(

°F)

Indoor DB temperature(°F)

(1) COOL operation

1Data is based on the condition of indoor

humidity 50%

➁

Air flow speed : High

➂

Inverter output frequency : 33Hz

<How to work fixed-frequency operation>

1.Set emergency switch to COOL or HEAT.The switch is locat­ed on indoor unit.

2.Press emergency run ON/OFF button.

3.Compressor starts running at 33Hz (COOL) or 45Hz (HEAT).

4.Indoor fan runs at High speed.

5.To cancel this operation,press emergency run ON/OFF button

or any button on remote controller.

(2) HEAT operation

①

Data is based on the condition of outdoor
humidity 75%

➁

Set air flow to High speed.

➂

Inverter output frequency is 45Hz.

38

7

OUTLINES AND DIMENSIONS

MSH09TW MSH09TW -

INDOOR UNIT

10-15/16

2-5/16

6-3/8

Wireless remote controller

U1

Installation plate

Indoor unit

32-3/16

33-1/2

6-1/224-3/42-1/4

3/4

MUH09TW MUH12TN MUH09TW ­MUH12TN - MUH12TN -

U2U1

3-5/16

1-5/8

3-1/4

Air in

U1

12-13/16 12-13/16

3/16

7-7/16

1/4 or more

2-5/8

3-15/16

Air out

3-1/16

REQUIRED SPACE

4 in. or more

6-5/8

1/8

4-5/8

Wall hole [2-9/16

Installation plate

Liquid line [1/4 19-11/16
Gas line [3/8 16-15/16

{

Insulation [1-7/16 O.D

[13/16 I.D

Drain hose [5/8
(Connected part O.D)

Insulation [1-1/8

Outdoor

unit

3/16

9-1/8

10-11/16

1-5/8

4 in. or more

Unit: inch

4 in.or more

OUTDOOR UNIT

Air in

12-19/32

1-1/4

4-9/32

Air in

Drainage
3holes [1-5/16

21-1/4

10-1/4

1-9/16

13/32

5-25/32

4-13/16

4-11/32

Airout

19-22/32

30-23/32

10-1/32

11-7/32

31/32

6-3/32

2-29/32

12-19/32

3-17/32

4-3/32

39

Service panel

Grounding

Service panel

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [1/4

35-

43-

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [3/8 (MUH09TW
[1/2 (MUH12TN

terminal

16 in. or more

Lock nut

NOTE: Do not wire 12V DC and 115V AC

in same conduit hole.

)
)

14 in. or more

Connector

Conduit
cover

MSH12TN MSH15TN MSH17TN MSH12TN - MSH15TN - MSH17TN -

INDOOR UNIT

39-3/16

4holes 7/16 O 13/16

5-7/8 25-1/2 8-9/16

1-9/16

2-3/8

Indoor unit

U1U1U1

Unit: inch

13/16

39-15/16

12-5/8

7-1/230-1/21-15/16

2-5/16

6-3/8

Wireless remote controller

3/4

MUH15TN MUH15TN - MUH15TN -

OUTDOOR UNIT

Drainage
hole [5/8

1-3/8

13-31/32

13-3/4

Air in

13/16

Installation plate

Air in

U2U1

Air out

17-11/16

17-11/16

13-7/817-1/4

3/167-1/2

Installation plate

Liquid line [ 5/16 19-11/16
Gas line [1/2 16-15/16

{

Insulation [ 1-15/16 O.D

Drain hose [
Insulation [ 1-1/8

4 in.

10

10-13/16

Wall hole [2-15/16

[ 1-1/8 I.D

5/8

4 in.

1/8 11-11/16

4 in.

3-17/32

9-3/4

Air in

Drainage

3holes [1-5/16

23-13/16

11-1/2

13/16

Air out

7-3/16

19-11/16

33-7/16

1-15/16

11-7/16

1-3/16

6-3/16

2-15/16

12-3/16

3-15/16

40

13-9/16

6-5/16

20 in.

Service panel

Liquid refrigerant
pipe joint

Refrigerant pipe
(flared) [1/4

35-

30-

Gas refrigerant
pipe joint
Rfrigerant pipe
(flared) [5/8

NOTE: Do not wire12V DC and

14 in.

Lock nut

Connector

Conduit
cover

115V AC in same conduit hole.

MUH17TN MUH17TN -

OUTDOOR UNIT

U1

Unit: inch

8

upper clearance.

Note:Allow adequate

1/2

1/2

11/169/16

Air intake

19-11/16

7-9/32 7-9/32

4

Front opening

14-1/4

13

1-9/161-1/16

Air intake

36

1/2

Air outlet

(for N.E.C)

Service space

36

1-3/4

Refrigerant pipe

(Flared) 1/4

Refrigerant pipe

(Flared) 5/8

33-1/2

21-3/4

11-7/8

Handie for moving

Service panel

Ground

terminal

Terminal block for indoor and outdoor unit connection

Terminal block for power line

34-1/4

20-5/18

13-7/8

13-7/4

15-7/8

7-1/18

17-3/18

2-1/16

Knock out holes for

power line 1-1/16

4-3/4

2-3/8

Knock out hole

for front piping

(refrigerant. drainage

and wiring)

Knock out hole for

right piping

2-3/820-5/81-9/16

1/5/16

4-1/8

1/2x7/8 Oval hoies

(standard bolt W3/8(M10)

1 max.

3-1/8

R13/16

R13/16

(refrigerant. drainage

and wiring)

1-3/4
1-5/8

Bottom piping hole

Drain hole

Standard bolt length

2-9/16

Front right piping holes-

detail figures

11/16

R1/4

1/2

2-U-shaped

notched

holes

Drain hole

8

40

The upper side must be open.

For 10 units or less

1/2

(Concentrated installation)

Outdoor Unit-Necessary surrouding clearance

4

1

11-5/8

Outlet guide

installation hole

Handle for

moving

41

Handle for moving

Rear fresh

air intake

Side air intake

2

Conduit hole

1

NOTE: Do not wire12V DC and 115V AC in same conduit hole.

Rear piping hole

3-3/4

5-7/16

MXZ30TN MXZ30TN2

Lock nut

Conduit cover

Connector

OUTDOOR UNIT

Base bolt length

Less than

1

Veranda

Base

Rubber cushion

13/32 1-3/812-19/32

19-11/16

7-7/8 7-7/8

Air in

Air out

35-7/16

2-U-shape notched holes

(Base bolt M10)

1-1/16

Air in

13-31/32

1-9/16

2-15/32 ✕ 1-13/32 Oval hole

(Base bolt M10)

Unit: inch

15-1/4

[

9.52 (flared) 3/8 (B, C unit)

12.7 (flared) 1/2 (A unit)

[

Handle for
moving

1.Installation space

Note : Leave front and both sides
clearance fully.

Note : Leave front and overhead
clearance fully.

Air in

19-11/16

Air in

29/32

More than

1-5/16

More than
3-15/16

More than

7-7/8

18-1/8

12-15/32

3-15/32

35-7/16

29/32

Note : Obstacle on front and rear side only.

The unit can be used by attaching an optional
outdoor outlet guide (MAC-855SG)
(but both sides and the top are opend.)

Liquid pipe

[

6.35 (flared) 1/4

2.Service space

C unit connection
B unit connection
A unit connection

More than

3-15/16

More than

3-15/16

Note : Leave front, overhead and
both clearance fully.

More than
13-25/32

More than

19-11/16

42

More than

3-15/16

More than

13-25/32

More than
13-25/32

Service space

More than

1911/16

8

WIRING DIAGRAM

MSH09TW

MODEL WIRING DIAGRAM

INDOOR UNIT

TB

TO OUTDOOR
UNIT
CONNECTING
WIRES
12V DC

FROM OUTDOOR
UNIT
CONNECTING
WIRES

POWER

(

)

SUPPLY
115V
1 phase
60Hz

TO OUTDOOR
UNIT
CONNECTING
WIRE

TO OUTDOOR
UNIT
CONNECTING
WIRES
12V DC

POWER SUPPLY
115V 1 phase
60Hz

SYMBOL

C11

F11

HIC1

MF

NOTE:1. About the outdoor side electric wiring, refer to the outdoor unit electric wiring diagram for servicing.

INDOOR FAN CAPACITOR
FUSE(3A)
DC/DC CONVERTER
INDOOR FAN MOTOR(INNER FUSE)

2. Use copper conductors only.(For field wiring)

3. Symbols below indicate;
: Terminal block, : Connector

w

FOR MULTI SYSTEM

NAME

MUH09TW

OUTDOOR UNIT

ORN

3+
1-

N

L1

VLT

BLK

RED

CN

151

CN201

TAB12

LD101T

5

3+

1-

N

L1

w A disconnect may be required by local code.

MV

POWER MONITOR,
RECEIVER
P.C.BOARD

SYMBOL

MV

NR11

RT11

RT12

VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMIST OR
INDOOR COIL THERMISTOR

MODEL WIRING DIAGRAM

FROM INDOOR UNIT
CONNECTING
WIRE

TB2

+

1

ORN

VLT

-

BLK

RED

GRN/YLW

RED

RED
BLK

FROM INDOOR UNIT
CONNECTING WIRES
12V DC

TO INDOOR UNIT
CONNECTING
WIRES
115V
1 phase 60Hz

POWER
SUPPLY
115V
1 phase 60Hz

GROUND

3

1

N

L

TB1

L1

N

1
2
3
4

ELECTRONIC CONTROL P.C. BOARD

5

REMOTE
CONTROLLER

NAME NAME

CN730

1
3

TAB20

DSAR

RT61

F61

IC881

TRANS

52C

43

21S4

CN721CN661

X62

NR61

DEICER P.C.BOARD

BLK

HIC1

TRANS

F11

SYMBOL

X62

SR61

C1

NR11

SR141

SR141

TB

CN711

C65

WHT

RED
BLK

CN

112

CN

111

3

CN
121

1

C11

2
3

CN211

SOLID STATE RELAY
TERMINAL BLOCK

MF

RED

1

WHT

2
3

BLK

4

C

MC

R

S

RT12
RT11

BLK

1

GRY

2

YLW

3

BRN

WHT

RED

MF

4
5
6

SG79J022H01

SYMBOL

C1

COMPRESSOR CAPACITOR

C65

DSAR

F61

IC881

NOTE:1. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing.

OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
DC/DC CONVERTER

2. Use copper conductors only.(For field wiring)

3. Symbols below indicate;
: Terminal block, : Connector

NAME

SYMBOL

MC

MF
NR61
RT61
SR61

NAME NAME
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY

43

SYMBOL

TB1
TB2

X62

21S4

52C

TERMINAL BLOCK
TERMINAL BLOCK
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR

VG79B007H01

RED

ORN

BLK

L1

N

TB

1-

3+

VLT

5

REMOTE
CONTROLLER

POWER MONITOR,
RECEIVER
P.C.BOARD

LD101T

TO OUTDOOR
UNIT
CONNECTING
WIRES
12V DC

FROM OUTDOOR
UNIT
CONNECTING
WIRES
POWER
SUPPLY

TO OUTDOOR
UNIT
CONNECTING
WIRE

115V
1 phase

60Hz

MV

ELECTRONIC CONTROL P.C. BOARD

C11

F11

SR141

RT12
RT11

MF

HIC1

TRANS

NR11

TAB12

3

2

1

1

6

2
3
4
5

4

3

2

1

5

CN
121

112

CN

CN
111

CN211

CN201

CN
151

3

BLK
GRY
YLW
BRN
WHT
RED

(

)

w A disconnect may be required by local code.

W

MSH09TW -

INDOOR UNIT

U1

MODEL WIRING DIAGRAM

SYMBOL

C11

F11

HIC1

MF

NOTE:1. About the outdoor side electric wiring, refer to the outdoor unit electric wiring diagram for servicing.

INDOOR FAN CAPACITOR
FUSE(3A)
DC/DC CONVERTER
INDOOR FAN MOTOR(INNER FUSE)

2. Use copper conductors only. (For field wiring)

3. Symbols below indicate;

/: Terminal block, : Connector

MUH09TW -

OUTDOOR UNIT

SYMBOL

C1

C65

DSAR

F61

IC881

MC

NOTE:1. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing.

COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
DC/DC CONVERTER
COMPRESSOR(INNER PROTECTOR)

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate;
/: Terminal block, : Connector

NAME

U1

FROM INDOOR UNIT
CONNECTING
WIRE

FROM INDOOR UNIT
CONNECTING WIRES
12V DC

TO INDOOR UNIT
CONNECTING
WIRES
115V
1 phase 60Hz

POWER
SUPPLY
115V
1 phase 60Hz

NAME

GROUND

SYMBOL

MV
NR11
RT11
RT12

VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMIST OR
INDOOR COIL THERMISTOR

NAME NAME

MODEL WIRING DIAGRAM

RT61

TB2

3

1

N

1

L

TB1

L1

N

SYMBOL

MF

NR61

RT61
RT63
SR61

TB1,TB2

+

ORN

VLT

-

BLK

RED

GRN/YLW

OUTDOOR FAN MOTOR(INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
AMBIENT TEMPERA TURE THERMIST OR
SOLID STATE RELAY
TERMINAL BLOCK

CN730

1
3

F61

TAB20

RED

DSAR

RED
BLK

NAME NAME

44

RT63

CN662

IC881

TRANS

52C

43

SYMBOL

SR141

21S4

CN721CN661

X62

BLK

X62

SR61

NR61

DEICER P.C.BOARD

C1

SYMBOL

21S4

TB

WHT

RED
BLK

X62

52C

SOLID STATE RELAY
TERMINAL BLOCK

SG79J023H01

MF

CN711

C65

S

RED

1

WHT

2
3

BLK

4

C

MC

R

R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR

VG79B041H01

MSH12TN MSH15TN MSH17TN

MODELS WIRING DIAGRAM

INDOOR UNIT

TO OUTDOOR
UNIT
CONNECTING
WIRES
12V DC

FROM OUTDOOR
UNIT
CONNECTING
WIRES
POWER

( )

SUPPLY
115V
1 phase
60Hz

TO OUTDOOR
UNIT
CONNECTING
WIRE

FOR MULTI SYSTEM

TO OUTDOOR
UNIT
CONNECTING
WIRES
12V DC

POWER SUPPLY
115V 1 phase
60Hz

SYMBOL

C11

DSAR

F11

HIC1

NOTE:1. About the outdoor side electric wiring, refer to the outdoor unit electric wiring diagram for servicing.

INDOOR FAN CAPACITOR
SURGE ABSORVER
FUSE(3A)
DC/DC CONVERTER

2. Use copper conductors only. (For field wiring)

3. Symbols below indicate;
/: Terminal block, : Connector

NAME

w

MUH12TN

OUTDOOR UNIT

FROM INDOOR UNIT
CONNECTING
WIRE

FROM INDOOR UNIT
CONNECTING WIRES
12V DC

TO INDOOR UNIT
CONNECTING
WIRES
115V
1 phase 60Hz

POWER
SUPPLY
208/230V
1 phase 60Hz

TB

3+

ORN

1-

VLT

N

BLK

L1

RED

BRN

DSAR

3+

1-

N

L1

GRN/YLW

DISPLAY
P.C.BOARD

w A disconnect may be required by local code.

SYMBOL

MF

MV
NR11
RT11

CN201

1
2
3
4

TAB12

CN

102CN151CN104CN101

3

MV

F11

ELECTRONIC CONTROL P.C. BOARD

5

53

AUTO RESTART
ASSY

NAME NAME
INDOOR FAN MOTOR(INNER FUSE)
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMIST OR

MODEL WIRING DIAGRAM

RT61

GROUND

TB2

3

1

N

1

L

TB1

L1

N

L2

+

ORN

VLT

-

BLK

RED

RED

BLU

GRN/YLW

RED

CN730

1
3

TAB20

DSAR

CN661

F61

HIC1

HIC1

TRANS

IC881

TRANS

52C

4

RECEIVER
P.C.BOARD

CN721

X62

3

BLU

CN

112

CN

111

LDCOM
LDC11

C11

NR11

LDC12
LDFH

SR144

LDFL

SR142

LDFM

SR143

LDFVL

SR141

REMOTE
CONTROLLER

SYMBOL

RT12

SR141~SR144

TB

21S4

X62

CN711

SR61

NR61

DEICER P.C.BOARD

C1

WHT

RED
BLK

C65

1
2
3
4

MC

S

RT12
RT11

WHT

WHT

1

ORN

ORN

2

RED

RED

3

BLK

BLK
YLW
BLU
BRN

4
5
6
7
8

YLW
BLU
BRN

GRN/YLW

MF

INDOOR COIL THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK

VG79B016H01

MF

RED
WHT

BLK

C

R

SYMBOL

C1

COMPRESSOR CAPACITOR

C65

DSAR

F61

IC881

NOTE:1. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing.

OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
DC/DC CONVERTER

2. Use copper conductors only. (For field wiring)

3. Symbols below indicate;
/: Terminal block, : Connector

NAME

SYMBOL

MC

MF
NR61
RT61
SR61

NAME NAME
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY

45

SYMBOL

TB1
TB2

X62

21S4

52C

TERMINAL BLOCK
TERMINAL BLOCK
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR

VG79B008H01

MUH15TN MUH17TN

OUTDOOR UNIT

FROM INDOOR UNIT
CONNECTING WIRE

FROM INDOOR UNIT
CONNECTING WIRES
12V DC

TO INDOOR UNIT
CONNECTING
115V
1 phase 60Hz

POWER
SUPPLY
208/230V
1 phase 60Hz

WIRES

GROUND

TB2

N

L

TB1

L

N

L

MODELS WIRING DIAGRAM

RT61

RED

RED

CN730

1
3

TAB21

TAB20

RED

DSAR

CN661

F61

IC881

TRANCE

DEICER P.C. BOARD

NO

3

1

1

1

2

+

ORN

VLT

BLK

RED

BLU

GRN/YLW

X62

BLU

21S4

CN721

NR61

52C

COM

C1

X62

SR61

52C

CN720

CN711

C65

2
3

WHT

RED

SR

BLK

RED
WHT

BLK

MC

MF

RED

11

ORN

2

WHT

3

BLK

44

C

SYMBOL

C1

COMPRESSOR CAPACITOR

C65

DSAR

F61

IC881

NOTE:1. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing.

OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
DC/DC CONVERTER

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate;
/: Terminal block, : Connector

MSH12TN - MSH15TN - MSH17TN -

INDOOR UNIT

NAME

TO OUTDOOR
UNIT
CONNECTING
WIRES
12V DC

FROM OUTDOOR
UNIT
CONNECTING
WIRES
POWER

( )

SUPPLY
115V
1 phase
60Hz

TO OUTDOOR
UNIT
CONNECTING
WIRE

SYMBOL

NR61

RT61
SR61

w

MC
MF

3+

1-

N

L1

BRN

NAME NAME
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY

TB

ORN
VLT

BLK
RED

DISPLAY
P.C.BOARD

U1U1U1

CN

102CN151CN104CN101

DSAR

GRN/YLW

MODELS WIRING DIAGRAM

CN201

1
2
3
4

TAB12

F11

5

533

AUTO RESTART

MV

ASSY

HIC1

TRANS

ELECTRONIC CONTROL P.C. BOARD

w A disconnect may be required by local code.

SYMBOL

TB1
TB2

X62

21S4

52C

C11

NR11

RECEIVER
P.C.BOARD

TERMINAL BLOCK
TERMINAL BLOCK
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR

SG79J000H01

CN
112

CN
111

LDCOM
LDC11
LDC12
LDFH

SR144

LDFL

SR142

LDFM

SR143

LDFVL

SR141

REMOTE
CONTROLLER

WHT
ORN
RED
BLK
YLW
BLU
BRN

RT12
RT11

WHT

1

ORN

2

RED

3

BLK

4

YLW

5

BLU

6

BRN

7
8

GRN/YLW

MF

SYMBOL

C11

DSAR

F11

HIC1

NOTE:1. About the outdoor side electric wiring, refer to the outdoor unit electric wiring diagram for servicing.

INDOOR FAN CAPACITOR
SURGE ABSORVER
FUSE(3A)
DC/DC CONVERTER

2. Use copper conductors only. (For field wiring)

3. Symbols below indicate;
/: Terminal block, : Connector

NAME

SYMBOL

MF

MV
NR11
RT11

NAME

SYMBOL
INDOOR FAN MOTOR(INNER FUSE)
VANE MOTOR

SR141~SR144
VARISTOR
ROOM TEMPERATURE THERMIST OR

46

RT12

TB

NAME
INDOOR COIL THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK

VG79B017H01

MUH12TN -

U1

OUTDOOR UNIT

FROM INDOOR UNIT
CONNECTING
WIRE

FROM INDOOR UNIT
CONNECTING WIRES
12V DC

TO INDOOR UNIT
CONNECTING
WIRES
115V
1 phase 60Hz

POWER
SUPPLY
208/230V
1 phase 60Hz

GROUND

TB2

3

1

N

L

TB1

L1

N

L2

1

MODEL WIRING DIAGRAM

+

ORN

VLT

-

BLK

RED

GRN/YLW

RED

BLU

RED

CN730

1
3

TAB20

DSAR

RT61 RT63

F61

IC881

TRANS

52C

4

21S4

CN721CN661

CN662

X62

NR61

3

DEICER P.C.BOARD

BLU

C1

X62

SR61

WHT

RED
BLK

CN711

C65

S

MF

RED

1

WHT

2
3

BLK

4

C

MC

R

SYMBOL

C1

COMPRESSOR CAPACITOR

C65

DSAR

F61

IC881

NOTE:1. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing.

OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
DC/DC CONVERTER

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate;
/: Terminal block, : Connector

MUH15TN - MUH17TN -

OUTDOOR UNIT

NAME

FROM INDOOR UNIT
CONNECTING WIRE

FROM INDOOR UNIT
CONNECTING WIRES
12V DC

TO INDOOR UNIT
CONNECTING

WIRES
115V
1 phase 60Hz

POWER
SUPPLY
208/230V
1 phase 60Hz

GROUND

U1U1

SYMBOL

MC

MF

NR61

RT61
RT63

TB2

3

1

N

1

L

TB1

1

L

N

2

L

NAME NAME
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
AMBIENT TEMPERA TURE THERMIST OR

MODELS WIRING DIAGRAM

RT63

RT61

RED

RED

CN730

1
3

TAB21

TAB20

RED

DSAR

CN661

F61

CN662

X62

IC881

TRANCE

DEICER P.C. BOARD

NO

BLU

+

ORN

VLT

BLK

RED

BLU

GRN/YLW

21S4

CN721

NR61

52C

X62

SR61

COM

C1

SYMBOL

SR61

TB1,TB2

X62

21S4

52C

52C

CN720

CN711

C65

2
3

WHT

RED

SR

BLK

SOLID STATE RELAY
TERMINAL BLOCK
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR

VG79B042H01

MF

RED

RED

11

ORN

WHT

2

WHT

3

BLK

BLK

44

C

MC

SYMBOL

C1

COMPRESSOR CAPACITOR

C65

DSAR

F61

IC881

MC

NOTE:1. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing.

OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
DC/DC CONVERTER
COMPRESSOR(INNER PROTECTOR)

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate;
/: Terminal block, : Connector

NAME

SYMBOL

MF
NR61
RT61
RT63
SR61

TB1

NAME NAME
OUTDOOR FAN MOTOR(INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
AMBIENT TEMPERA TURE THERMIST OR
SOLID STATE RELAY
TERMINAL BLOCK

47

SYMBOL

TB2
X62

21S4

52C

TERMINAL BLOCK
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR

SG79J001H01

MUH12TN -

U2

OUTDOOR UNIT

FROM INDOOR UNIT
CONNECTING
WIRE

FROM INDOOR UNIT
CONNECTING WIRES
12V DC

TO INDOOR UNIT
CONNECTING
WIRES
115V
1 phase 60Hz

POWER
SUPPLY
208/230V
1 phase 60Hz

GROUND

TB2

3

1

N

L

TB1

L1

N

L2

MODEL WIRING DIAGRAM

RT61 RT63

RED

CN730

1
3

TAB20

DSAR

F61

IC881

TRANS

52C

4

CN662

3

1

+

ORN

VLT

–

BLK

RED

GRN/YLW

RED

BLU

21S4

CN721CN661

X62

X62

SR61

NR61

DEICER P.C.BOARD

C1

BLU

WHT

RED
BLK

CN711

C65

S

MF

RED

1

WHT

2
3

BLK

4

C

MC

R

SYMBOL

C1

COMPRESSOR CAPACITOR

C65

DSAR

F61

IC881

OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
DC/DC CONVERTER

MUH15TN -

OUTDOOR UNIT

SYMBOL

C1

COMPRESSOR CAPACITOR

C65

DSAR

F61

IC881

NOTE:1. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing.

OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
DC/DC CONVERTER

MC

COMPRESSOR(INNER PROTECTOR)

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate;
/: Terminal block, : Connector

NAME

U2

FROM INDOOR UNIT
CONNECTING WIRE

FROM INDOOR UNIT
CONNECTING WIRES
12V DC

TO INDOOR UNIT
CONNECTING

WIRES
115V
1 phase 60Hz

POWER
SUPPLY
208/230V
1 phase 60Hz

GROUND

NAME

SYMBOL

MC

MF
NR61
RT61
RT63

TB2

3

1

N

1

L

TB1

1

L

N

2

L

SYMBOL

MF

NR61

RT61
RT63
SR61

TB1

COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
AMBIENT TEMPERA TURE THERMIST OR

MODEL WIRING DIAGRAM

+

ORN

VLT

BLK

RED

BLU

GRN/YLW

OUTDOOR FAN MOTOR(INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
AMBIENT TEMPERA TURE THERMIST OR
SOLID STATE RELAY
TERMINAL BLOCK

NAME NAME

RT63

RT61

CN730

CN661

RED

RED

1
3

TAB21

TAB20

RED

DSAR

F61

CN662

X62

IC881

TRANCE

DEICER P.C. BOARD

NO

BLU

NAME NAME

21S4

CN721

NR61

52C

SYMBOL

SR61

TB1,TB2

X62

21S4

52C

CN720

X62

SR61

COM

WHT

C1

RED
BLK

SYMBOL

TB2
X62

21S4

52C

SOLID STATE RELAY
TERMINAL BLOCK
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR

VG79B543H01

52C

MF

CN711

C65

2
3

MC

SR

RED

WHT

BLK

C

11
2
3

44

RED
ORN
WHT
BLK

TERMINAL BLOCK
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR

SG79B542H01

48

MXZ30TN

MODELS WIRING DIAGRAM

OUTDOOR UNIT

DS61

C61

ORN

+

+

-

-

YLW

CT

LDB

61

LDB

SSR61

F911

(250V 1A)

CN913

12

RED

RED

21S4

ELECTRONIC CONTROL P.C. BOARD

CN793

BRN

BLU

ORN

YLW

WHT

LEV C

SYMBOL
LEV A~C

MC

MF61

R
RT61
RT62
RT63
RT65

RT66,67

RT68

GROUND

POWER SUPPLY
208/230V
1 phase 60Hz

INDOOR
UNIT (A)
INDOOR
UNIT (B)
INDOOR
UNIT (C)

FROM INDOOR UNIT

CONNECTING WIRES

DC 12V

SYMBOL

C61

C62,63

C65

CT61,62

DS61
DS62

F801
F911

L61

NAME
POWER FACTOR CAPACITOR
SMOOTHING CAPACITOR
OUTDOOR FAN CAPACITOR
CURRENT TRANSFORMER
DIODE MODULE
DIODE STACK
FUSE (250V 1A)
FUSE (250V 1A)
REACTOR

L

COMMON MODE CHOKE COIL

L1
L2

TB1

TB3

TB2

GRN/YLW

RED
BLU

TB4

1

3

1

3

1

3

BLU
RED

BLU
ORN

BLU
YLW

RED

X64

CN720

R

BLK

BLK

4

6

X64

0

1

GRY

BRN

12

12

CN601

12

CN602

12

CN603

CN791

123456

RED

BRN

BLU

ORN

LEV A

RED

BLK

GRN

YLW

TB5

LDE

WHT

LD62
LD61

LD63

L61

CN901

64

CN851 CN852

CN792

123456

RED

BRN

BLU

ORN

YLW

WHT

LEV B

WHT

LD64

CN902

123456

RED

NOTE: 1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring)

3.Symboles below indicate.

: Terminal block : Connector

DS62

A

ORN

K

WHT

NOISE FILTER
P.C.BOARD

X63

X62

C65

34

RED

ORN

WHT

BLK

123456

MF61

CN722 CN663

RED

RED

BLK

63H1 RT63

RT65

L

X61

BLU

YLW

12345612 1234

BLK

GRY

RT66 RT68

GRY

CN662

GRY

RT67

C63 C62

RED

+-+

YLW

1234

CN801

CN704

1234567

CN705

GRY

GRY

GRY

NAME
EXPANSION VALVE
COMPRESSOR
OUTDOOR FAN MOTOR (INNER FUSE)
RESISTOR
DISCHARGE TEMPERATURE THERMISTOR
DEFROST TEMPERATURE THERMIST OR
EVAPORATION TEMPERATURE THERMISTOR
FIN TEMPERATURE THERMISTOR
GUS PIPE TEMPERATURE THERMISTOR
GUS PIPE TEMPERATURE THERMISTOR

RED

-

CN501

4321

2

CN514

CN515

7654321

I.P.M P.C. BOARD

CN661

12345678

GRY

GRY

BLK

BLK

GRY

RT62

RT61

YLW

TAB62

F801

(250V 1A)

T801

CT62

GRY

SYMBOL

SSR61

T801

TB1~5

X61,62,63

X64,65
X66,67

21S4
63H1
63H2

TAB63

V

MC

UW

RED

WHT

BLK

TAB64

TAB65

TAB66

NAME
SOLENOID COIL RELAY
TRANSFORMER
TERMINAL BLOCK
FAN MOTOR RELAY
RELAY
RELAY
R.V. COIL
HIGH PRESSURE SWITCH
HIGH PRESSURE SWITCH

BRN
GRY

21

X65

CN552

BLK

BLK

CN554CN551

X66

ORN
ORN

RELAY

P.C. BOARD

SG79A481H02

CN553

21

X67

63H2

WHT

WHT

49

POWER SUPPLY
208/230V
1 phase 60Hz

INDOOR
UNIT (A)

TB1

TB4

BLU
RED

X64

GRN/YLW

GRN

CN720

CN601

0

LD62

CN913

CN791

CN901

64

2

CN902

CN851 CN852

MF61

21S4

12

21

21

12

12

34

123456

1234567

123456

C65

LD64

LDB

LDB

LD61

LDE

L61

F911

SSR61

X63

X62

X61

1

L1
L2

3

1

INDOOR
UNIT (B)

BLU
ORN

CN602

12

3

3

1

INDOOR
UNIT (C)

BLU
YLW

CN603

12

1

RED

BRN

GRY

WHT

YLW

RED

RED

RED

BRN

BLU

ORN

YLW

WHT

ORN

WHT

BLK

BLU

YLW

RED

ORN

ORN

RED

RED

YLW

YLW

BLK

BLK

ORN
ORN

BRN
GRY

X65

X66

X67

63H2

CN552

CN553

BLK

RELAY

P.C. BOARD

WHT

WHT

RED

WHT

V

UW

A

K

L

WHT

NOISE FILTER
P.C.BOARD

RED

DS61

DS62

C61

CT
61

C63 C62

+

+

-

+-+

-

-

BLU

LEV A

CN792

123456

RED

BRN

BLU

ORN

YLW

WHT

LEV B

CN793

123456

RED

BRN

BLU

ORN

YLW

WHT

LEV C

CN722 CN663

63H1 RT63

CN662

12345612 1234

RED

RED

BLK

BLK

RT66 RT68

RT67

GRY

GRY

GRY

GRY

GRY

GRY

CN661

CN705

7654321

CN515

1234

4321

CN801

CN501

TAB62

TAB63

T801

CT62

TAB66

TAB65

TAB64

I.P.M P.C. BOARD

F801

(250V 1A)

CN704

CN514

CN554CN551

12345678

RT62

RT61

RT65

GRY

GRY

BLK

BLK

GRY

GRY

ELECTRONIC CONTROL P.C. BOARD

MC

(250V 1A)

GROUND

TB3

TB2

FROM INDOOR UNIT

CONNECTING WIRES

DC 12V

SYMBOL

C61

C62,63

C65

CT61,62

DS61
DS62

F801
F911
F912

L

L61

SYMBOL
LEV A~C

MC
MF61
NR63

R
RT61
RT62
RT63
RT65

RT66,67

RT68

NAME
POWER FACTOR CAPACITOR
SMOOTHING CAPACITOR
OUTDOOR FAN CAPACITOR
CURRENT TRANSFORMER
DIODE MODULE
DIODE STACK
FUSE (250V 1A)
FUSE (250V 1A)
FUSE (3.15A)
REACTOR
COMMON MODE CHOKE COIL

NAME
EXPANSION VALVE
COMPRESSOR
OUTDOOR FAN MOTOR (INNER FUSE)
VARISTOR
RESISTOR
DISCHARGE TEMPERATURE THERMISTOR
DEFROST TEMPERATURE THERMIST OR
EVAPORATION TEMPERATURE THERMISTOR
FIN TEMPERATURE THERMISTOR
GUS PIPE TEMPERATURE THERMISTOR
GUS PIPE TEMPERATURE THERMISTOR

SYMBOL

SSR61

T801

TB1~4

X61,62,63

X64,65
X66,67

21S4
63H1
63H2

NAME
SOLENOID COIL RELAY
TRANSFORMER
TERMINAL BLOCK
FAN MOTOR RELAY
RELAY
RELAY
R.V. COIL
HIGH PRESSURE SWITCH
HIGH PRESSURE SWITCH

NOTE: 1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring)

3.Symboles below indicate.

: Terminal block : Connector

4

LD63

6 BLK

BLK

BLK

RED

R

(3.15A)

LD65

F912

NR63

N

MXZ30TN2

OUTDOOR UNIT

MODELS WIRING DIAGRAM

SG79Y087H01

50

9

REFRIGERANT SYSTEM DIAGRAM

MSH09TW MSH09TW -

Unit:inch

U1

MUH09TW MUH09TW -

U1

INDOOR UNIT

Indoor coil

Indoor
heat

exchanger

Room temperature
thermistor
RT11

thermistor
RT12

Refrigerant pipe [3/8
(Option)

(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe [1/4
(Option)
(with heat insulator)

Stop valve
(with service

port)

Service
port

Fusible
plug

Strainer

Stop valve

Muffler

4-way
valve

Muffler

Compressor

Capillary tube CT3
O.D. 0.12✕I.D.

✕31-1/2

0.063

Check
valve

Service
port

Strainer

Defrost
thermistor
RT61

Capillary tube CT2
O.D. 0.12✕I.D.

✕17-11/16

0.063

Flow of refrigerant (cooling)
Flow of refrigerant (heating)

OUTDOOR UNIT

Outdoor
heat
exchanger

Capillary tube CT1
O.D. 0.12✕I.D. 0.055✕
19-11/16

R.V. coil
heating ON
cooling OFF

Unit:inch

MUH12TN

MSH12TN

MSH12TN -

INDOOR UNIT OUTDOOR UNIT

Indoor coil

Indoor
heat
exchanger

Room temperature
thermistor
RT11

thermistor
RT12

Distributor

U1

Refrigerant pipe [1/2
(Option)
(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe [1/4
(Option)

(with heat insulator)

Muffler

Stop valve
(with service
port)

Service
port

Stop valve

Strainer

4-way
valve

Fusible
plug

Muffler

Strainer

Compressor

Service
port

Defrost
thermistor
RT61

Flow of refrigerant (cooling)
Flow of refrigerant (heating)

MUH12TN ­MUH12TN -

Outdoor
heat
exchanger

Capillary tube CT1
O.D. 0.12✕I.D.

0.055✕19-11/16

Capillary tube CT1
O.D. 0.12✕I.D.0.071✕11-13/16

R.V. coil

heating ON
cooling OFF

51

U1

U2

Indoor
heat
exchanger

Outdoor
heat
exchanger

Indoor coil
thermistor
RT12

Room temperature
thermistor
RT11

Refrigerant pipe [5/8
(Option)
(with heat insulator)

Flared connection

Distributor

Refrigerant pipe [1/4
(Option)
(with heat insulator)

Flared connection

Stop valve
(with service port)

Strainer
#100

Strainer
#100

Stop valve

4-way

valve

Flow of refrigerant (cooling)
Flow of refrigerant (heating)

Accumulator

Muffler

Compressor

Muffler

Service
port

Service
port

Fusible
plug

Defrost
thermistor
(RT61)

Check
valve

Capillary tube CT3
O.D. 0.12✕I.D. 0.079✕9-13/16

Capillary tube CT2
O.D. 0.12✕I.D. 0.079✕27-9/16

R.V. coil
heating ON
cooling OFF

Distributor

Unit:inch

MSH15TN

MSH15TN -

INDOOR UNIT OUTDOOR UNIT

Indoor coil

Indoor
heat
exchanger

Room temperature
thermistor
RT11

thermistor
RT12

Distributor

U1

Refrigerant pipe [5/8
(Option)
(with heat insulator)

Flared connection

Muffler

Stop valve
(with service
port)

Service
port

Accumulator

4-way
valve

Fusible
plug

Muffler

Strainer

Compressor

MUH15TN

Service
port

#100

Defrost
thermistor
RT61

MUH15TN ­MUH15TN -

Outdoor
heat
exchanger

Capillary tube CT1
O.D. 0.12✕I.D.

0.055✕11-13/16

U1
U2

Flared connection

Refrigerant pipe [1/4
(Option)

(with heat insulator)

Strainer
#100

Stop valve

Capillary tube CT3
O.D. 0.12✕I.D.0.079✕23-5/8

Check
valve

Capillary tube CT2
O.D. 0.12✕I.D.0.079✕7-7/8

R.V. coil

heating ON
cooling OFF

Flow of refrigerant (cooling)
Flow of refrigerant (heating)

Unit:inch

MSH17TN MSH17TN -

U1

MUH17TN MUH17TN -

INDOOR UNIT OUTDOOR UNIT

U1

52

Ball valve with

service port

Ball valve with

service port

Distributor

Strainer

#100

Strainer
#100

LEV

Oil
separator

Compressor

High pressure
switch 1

Accumulator

Capillary tube CT2

Reversing valve

Discharge
temperature
thermistor

Evaporation
temperature
thermistor

Defrost
thermistor

Strainer
#100

Distributor
#50

Outdoor
heat
exchanger

High pressure
switch 2

Indoor unit

C

Unit C gas pipe temperature
thermistor

Indoor unit

B

Unit B gas pipe temperature
thermistor

Indoor unit

A

Indoor unit

A

Strainer

#100

LEV

Indoor unit

B

Strainer

#100

LEV

Indoor unit

C

Unit A gas pipe
temperature thermistor

Capillary tube CT1

O.D. 0.0985 ✕ I.D. 0.024 ✕ 29.53

O.D. 0.0985 ✕ I.D. 0.024 ✕ 39.37

Capillary tubeCT3,4,5

O.D. 0.157 ✕ I.D. 0.094

✕ 15.75

Capillary tube CT6

Capillary tube CT7

Capillary tube CT8

O.D. 0.12 ✕ I.D. 0.079 ✕ 7.87

O.D. 0.12 ✕ I.D. 0.079 ✕ 7.87

O.D. 0.12 ✕ I.D. 0.079 ✕ 7.87

Muffler

Refrigerant flow in cooling
Refrigerant flow in heating

R.V. coil
heating ON
cooling OFF

Fusible

plug
Service
port

Service
port

MXZ30TN MXZ30TN2

Unit: inch

53

10

lighted
not lighted

Approx. 4 ˚F or more

Difference between target
temperature and room
temperature

Approx. 4 ˚F or less

This shows that the air conditioner is operating to reach
the target temperature.
Please wait until the target temperature is obtained.

This shows that the room temperature is
approaching the target temperature.

Operation stateIndication

Operation Indicator

Operation Indicator lamp

The operation indicator located at the right side of the indoor unit indicates the operation state.

• The following indication applies regardless of shape of the indicatior.

INDOOR UNIT DISPLAY SECTION

ON/OFF

FAN

TOO

WARM

TOO

COOL

VANE

MODE

STOP

START

HR.

MIN.

I FEEL

COOL

HEAT

DRY

RESET CLOCK

OPERATION SELECT button

FAN SPEED CONTROL button

OFF-TIMER button

HR. button

MIN. button

(TIME SET button)

ON-TIMER button

RESET button

VANE CONTROL button

CLOCK SET button

ON/OFF

TOO

COOL

PM

AM

TOO

WARM

Signal transmitting section

Operation display section

OPERATE /STOP

(ON /OFF)button

TEMPERATURE buttons

MICROPROCESSOR CONTROL

MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW ­MSH12TN ­MSH15TN ­MSH17TN -

U1

MUH09TW

U1

MUH12TN

U1

MUH15TN

U1

MUH17TN

MUH09TW ­MUH12TN ­MUH15TN ­MUH17TN -

U1

U1

MUH12TN -

U1

MUH15TN -

U1

MXZ30TN

U2

MZX30TN2

U2

Once the operation mode are set, the same operation mode can be repeated by simply turning the OPERATE/STOP(ON/OFF)
button ON.
Indoor unit receives the signal with a beep tone.
When the system turns off, 3-minute time delay will operate to protect system from overload and compressor will not restart for
3 minutes.

WIRELESS REMOTE CONTROLLER

54

10-1. “I FEEL CONTROL” OPERATION

(1) Press OPERATE/STOP(ON/OFF) button on the remote controller.

OPERATION INDICATOR lamp of the indoor unit turns on with a
beep tone.

(2) Press OPERATION SELECT button to set “I FEEL CONTROL”.

Then a beep tone is heard.

(3) The operation mode is determined by the room temperature at

start-up of the operation.

● Once the mode is fixed, the mode does not change by room temperature afterwards.

● Under the ON-TIMER ( START) operation, mode is determined according to the room temperature as the operation

starts.

● When the system is stopped with the OPERATE/STOP(ON/OFF) button on the remote controller, and restarted within 2
hours in “I FEEL CONTROL” mode, the system operates in previous mode automatically regardless of the room tem­perature.

Operation time chart
Example

Initial room temperature

77˚F or more
73˚F to 77˚F

less than 73˚F

“I FEEL CONTROL”

“I FEEL CONTROL”

“I FEEL CONTROL”

mode

COOL mode of

DRY mode of

HEAT mode of

Previous operation

COOL mode of
“I FEEL CONTROL”
or COOL mode

When the system is restarted after 2 hours and more, the operation mode is determined by the room temperature at
start-up of the operation.

Operation time chart
Example

Previous operation

COOL mode of
“I FEEL CONTROL” or
COOL mode

(4) The initial set temperature is decided by the initial room temperature.

Restart

COOL mode of
“I FEEL CONTROL”

Restart

COOL or DRY or HEAT
mode of “I FEEL CON­TROL” that determined
by room temperature at
start-up of the operation.

Mode Initial room temperature Initial set temperature

COOL mode of

“I FEEL CONTROL”

DRY mode of

“I FEEL CONTROL”

HEAT mode of

“I FEEL CONTROL”

❈1 When the system is restarted with the remote controller, the system operates with the previous set temperature regard-

less of the room temperature at restart.
The set temperature is calculated by the previous set temperature.

79˚F or more

77˚F to 79˚F

73˚F to 77˚F

less than 73˚F

55

75˚F

Initial room temperature
minus 4˚F
Initial room temperature
minus 4˚F

79˚F

❈ 1

Difference between room
temperature and set temperature
during operation

(5) TEMPERATURE buttons

TOO

COOL

TOO

WARM

In “I FEEL CONTROL” mode, set temperature is decided by the microprocessor based on the room temperature.
In addition, set temperature can be controlled by TOO WARM or TOO COOL buttons when you feel too cool or too
warm.
Each time the TOO WARM or TOO COOL button is pressed, the indoor unit receives the signal and emits a beep tone.

● Fuzzy control

When the TOO COOL or TOO WARM button is pressed, the microprocessor changes the set temperature, consider­ing the room temperature, the frequency of pressing TOO COOL or TOO WARM button and the user’s preference to
heat or cool. So this is called “Fuzzy control”, and works only in “I FEEL CONTROL” mode.
In DRY mode of “I FEEL CONTROL”, the set temperature doesn’t change.

…

To raise the set temperature 2~4 degrees(°F)

…

To lower the set temperature 2~4 degrees(°F)

— COOL mode of “I FEEL CONTROL” —

1. Indoor fan speed control

Indoor fan operates at the set speed by FAN SPEED CONTROL button.
In AUTO the fan speed is as follows.

Initial temperature difference

Fan speed
Room temperature minus set temperature : 2 degrees or more········································High
Room temperature minus set temperature : Between 1 and 2 degrees····························Med.
Room temperature minus set temperature : less than 1 degrees······································Low

2 deg.

4 deg.

3 deg.

2. Coil frost prevention

① Temperature control

<MSH09> When the indoor coil thermistor RT12 reads 39˚F or below for 5 minutes, the coil frost prevention mode starts.
<MSH12/15/17> When the indoor coil thermistor RT12 reads 37˚F or below, the coil frost prevention mode starts

immediately. However the coil frost prevention doesn’t work for 5 minutes since the compressor has

started.
The indoor fan operates at the set speed the compressor stops for 5 minutes.
After that, if RT12 still reads below 39˚F (MSH09) or below 37˚F (MSH12/15/17) this mode is prolonged until the RT12
reads over 39˚F (MSH09) or 37˚F (MSH12/15/17).

② Time control

When the three conditions as follows have been satisfied for 1 hour and 45 minutes, compressor stops for 3 minutes.
a. Compressor has been continuously operating.
b. Indoor fan speed is Low or Med..
c. Room temperature is below 79˚F.
When compressor stops, the accumulated time is cancelled and when compressor restarts, time counting starts
from the beginning.
Time counting also stops temporarily when the indoor fan speed becomes High or the room temperature exceeds
79°F. However, when two of the above conditions (b.and c.) are satisfied again. Time accumulation is resumed.

ON

ON

7 deg.

Compressor and

OFF

Outdoor fan motor

Indoor fan motor

ON (continuously at set speed)

OFF

56

Difference between room
temperature and set
temperature during
operation

—DRY mode of “I FEEL CONTROL”—

The system for dry operation uses the same refrigerant circuit as the cooling circuit.
The compressor and the indoor fan are controlled by the temperature.
By such controls, amount of air flow of indoor unit will be reduced in order to lower humidity without much room tempera­ture drop.

1. Indoor fan speed control

Indoor fan operates at the set speed by FAN SPEED CONTROL button.
In AUTO fan operation, fan speed becomes Low.

2. The operation of the compressor and indoor/ outdoor fan (Refer to page 65 for MXZ30TN)
Compressor operates by room temperature control and time control.
Set temperature is controlled to fall 4˚F as initial set temperature.
Indoor fan and outdoor fan operate in the same cycle as the compressor.

• When the room temperature is 73˚F or over:

When the thermostat is ON, the compressor repeats 8 minutes ON and 3 minutes OFF.
When the thermostat is OFF, the compressor repeats 4 minutes OFF and 1 minute ON.

• When the room temperature is under 73˚F.

When the thermostat is ON, the compressor repeats 2 minutes ON and 3 minutes OFF.
When the thermostat is OFF, the compressor repeats 4 minutes OFF and 1 minute ON.

Operation time chart

Example: When the room temperature is 73˚F or over

ON

ON

Thermostat

OFF

ON

Indoor fan

OFF

ON

Outdoor fan
Compressor

OFF

8 min.

3. Coil frost prevention

• The operation is as same as coil frost prevention during COOL mode of “I FEEL CONTROL”.

• Indoor fan operates at the set speed and the compressor stops for 5 minutes, because protection (Coil frost

prevention) has the priority.
However, when coil frost prevention works while the compressor is not operating, the speed becomes Low.

— HEAT mode of “I FEEL CONTROL” —

1. Indoor fan speed control

(1) In AUTO the fan speed is as follows.

Set temperature minus room temperature: 2 degrees or more··········································High
Set temperature minus room temperature: Between 1 and 2 degrees· ·····························Med.
Set temperature minus room temperature: less than 1 degree ··········································Low

(2) Cold air prevention control

<MSH09>

1 When the compressor is not operating,

(1) if the temperature of indoor coil thermistor RT12 is 64°F or less, the indoor fan stops.
(2) if the temperature of indoor coil thermistor RT12 is more than 64°F, the indoor fan operates at Very Low.

2 When the compressor is operating,

(1) if the temperature of RT12 is 72°F or more, the indoor fan operates at set speed.
(2) if the temperature of RT12 is less than 72°F and

(1) if the temperature of room temperature thermistor RT11 is 59°F or less, the indoor fan stops.
(2) if the temperature of room temperature thermistor RT11 is more than 59°F, the indoor fan operates at Very

Low.

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

4 min.

3 min.

1 min.

Initial temperature difference Fan speed

57

2 deg.

4 deg.

3 deg.

7 deg.

<MSH12/15/17>

Released

Cold Air Prevention

64°F72°F

Indoor fan speed

Set speed
Very Low or stop

Indoor coil thermistor
RT12 temperature

<Time condition>

<Indoor fan speed>

less than 2 minutes Low
2 minutes to 4 minutes Med.
more than 4 minutes High

High pressure protection

Released

118˚F

(MSH09)

115˚F(MSH12/15/17)

126˚F(MSH09)
122˚F(MSH12/15/17)

ON

Outdoor fan

OFF

When the compressor is operating,

(1) if the temperature of indoor coil thermistor RT12 is less than 64°F or, the indoor fan operates at Very Low.

But if the temperature of room temperature thermistor RT11 is 59°F or less, the fan stops.

(2) if the temperature of indoor coil thermistor RT12 is more than 72°F, the indoor fan operates at set speed.

NOTE : If the temperature of RT12 reads from 64°F to 72°F at the air conditioner starting and also after defrosting,

this control works.

(3) Warm air control.

When any condition of 1(a. ~ d.) and the condition of 2 as follows are satisfied at the same time, warm air control
works.

1 a.) when the operation mode has been changed to HEAT mode

b.) when cold air prevention has been released
c.) when defrosting has been finished
d.) when the compressor starts in HEAT mode

2 When the temperature of indoor coil thermistor RT12 is less than 99°F.

When warm air control works, the indoor fan speed changes as follows to blow out warm air gradually.

Gradation of indoor fan speed in initial

The upper limit of the indoor fan speed in MANUAL is the set speed.
The upper limit of the indoor fan speed in AUTO is the speed decided by indoor fan speed control.
When the temperature of RT12 has been 99°F or more, or when the set speed has been changed, this control is
released and the indoor fan speed is the set speed.

(4) Flow soft control

When the thermostat (compressor) is off, the indoor fan operates as follows.

< RT12 > < Indoor fan speed >

<MSH09> less than 64°F off

64°F or more Very Low

<MSH12/15/17> — Very Low

NOTE : When the thermostat(compressor) turns on, the indoor

fan operates at set speed. But until cold air prevention
and warm air control is released, the indoor fan follows
them.

2. High pressure protection (Refer to page 70 for MXZ30TN MXZ30TN2)
During heating operation, the outdoor fan motor is controlled by the indoor coil thermistor RT12 temperature for excess
rise protection of compressor discharge pressure.
Outdoor fan OFF : 126˚F (MSH09), 122˚F (MSH12/15/17)
Outdoor fan ON : 118˚F (MSH09), 115˚F (MSH12/15/17)

High pressure protection time chart
Example

Indoor coil thermistor
RT12 temperature

126˚F(MSH09)
122˚F(MSH12/15/17)

118˚F(MSH09)
115˚F(MSH12/15/17)

Outdoor fan motor
turn OFF

Outdoor fan motor
turn ON

Outdoor fan motor

ON

NOTE: During high pressure protection and for 4 minutes and 15 seconds after high pressure protection, defrosting of

outdoor heat exchanger is not detected by the defrost thermistor RT61.

OFF

ON

58

OFF

3. Defrosting (Refer to page 70 for MXZ30TN MXZ30TN2)
Defrosting of outdoor heat exchanger is controlled by deicer P.C. board, which detection by the defrost thermistor RT61.
(1) Starting conditions of defrost

When all conditions of a) ~ c) are satisfied, the defrosting operation starts.
a) Under the heat operation, the compressor cumulative operation time exceeds 40 minutes (MSH09TW, MSH12/15/

17TN) /15 minutes (MSH09TW - , MSH12/15/17TN- , MSH12/15TN- ) without the defrosting operation

U2U1U1

working.

b) The defrost thermistor RT61 reads 27˚F or less (MSH09TW, MSH12/15/17TN) / 32°F or less (MSH09TW - ,

MSH12/15/17TN- , MSH12/15TN- ).

U2U1

c) After releasing the high pressure protection 4 minutes and 15 seconds have elapsed.

(2) Releasing conditions of defrost

When the condition d) or e) is satisfied, the defrosting operation stops.
d) The defrost thermistor RT61 reads 38˚F or more (MSH09TW, MSH12/15/17TN) / 50°F or more (MSH09TW - ,

MSH12/15/17TN- , MSH12/15TN- ).

U2U1

e) The defrosting time exceeds 10 minutes.

(3) Defrosting time chart

Defrost thermistor RT61

U1

U1

50°F or more
(MSH09TW - , MSH12/15/17TN- ,
MSH12/15TN- )
38˚F or more

(MSH09TW, MSH12/15/17TN)
32°F or less

(MSH09TW - , MSH12/15/17TN- ,
MSH12/15TN- )
27°F or less

(MSH09TW, MSH12/15/17TN)

U2

U2

Outdoor 52C
contactor(Compressor)

X62
(R.V. coil)

SR61
Outdoor fan

Defrost
counter

U1U1

U1U1

ON
OFF

ON

OFF

ON
OFF

ON
OFF

30 sec.

15 sec.

30 sec.

5~15 sec.

Max 10 min.

Indoor fan

ON

OFF

Indoor vane

Horizontal

Set position

NOTE: ● When the indoor coil thermistor RT12 reads above 64˚F, indoor fan operates at Very Low for 30 seconds since

RT61 has read the working temperature of defrosting.

● When the indoor coil thermistor RT12 reads 64˚F or less, the indoor fan stops.

NOTE

59

4. R.V. coil control

50

50

59

68

77

86

95

59 68 77 86 95°F

°F

Heating · · · · · ON
Cooling · · · · · OFF
Dry · · · · · · · · OFF

NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.

(COOL / DRY)

5 sec.

(HEAT)

5 sec.

Compressor

ON
OFF

R.V. coil

ON
OFF

Outdoor fan

ON

OFF

5. Outdoor temperature control <MSH09TW - , MSH12/15/17TN- , MSH12/15TN- >

When the temperature of the ambient temperature thermistor RT63 falls below 19°F, the compressor stops for protecting
the unit.

COMPRESSOR

ON
OFF

19°F 29°F

NOTE: If the temperature of RT63 reads from 19°F to 29°F at the air conditioner starting, compressor operates.

10-2. COOL OPERATION

(1) Press OPERATE/STOP(ON/OFF) button.

OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select COOL mode with the OPERATION SELECT button.
(3) Press the TEMPERATURE buttons.

(TOO WARM or TOO COOL button) to select the desired temperature.

The setting range is 59 ~ 89˚F

✻ Indoor fan continues to operate regardless of thermostat’s OFF-ON at set speed.
✻ Coil frost prevention is as same as COOL mode of “I FEEL CONTROL”.

10-3. DRY OPERATION

(1) Press OPERATE/STOP(ON/OFF) button.

OPERATION INDICATOR lamp of the indoor unit turns on

with a beep tone.
(2) Select DRY mode with the OPERATION SELECT button.
(3) The microprocessor reads the room temperature and

determines the set temperature. Set temperature is as

shown on the right chart.

Thermostat (SET TEMP.) does not work.

The other operations are same as DRY mode of “I FEEL

CONTROL”.
(4) DRY operation will not function when the room tempera-

ture is 55˚F or below.

10-4. HEAT OPERATION

(1) Press OPERATE/STOP(ON/OFF) button.

OPERATION INDICATOR lamp of the indoor unit turns on

with a beep tone.
(2) Select HEAT mode with the OPERATION SELECT button.
(3) Press TEMPERATURE buttons (TOO WARM or TOO

COOL button) to select the desired temperature.

The setting range is 59 ~ 89˚F.
(4) Indoor fan speed control, high pressure protection, defrost-

ing, 4-way valve control are the same as HEAT mode of “I FEEL CONTROL”.

ON

OFF
ON

OFF

ON
OFF

U2U1U1

60

10-5. FAN MOTOR CONTROL<MSH09>

Rotational frequency

High High

time

Med.

Low

(1) Rotational frequency feedback control

The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the microprocessor to feed­back the rotational frequency. Comparing the current rotational frequency with the target rotational frequency (High,
Med., Low) the microprocessor controls SR141 and adjusts fan motor electric current to make the current rotational fre­quency close to the target rotational frequency. With this control, when the fan speed is switched, the rotational frequen­cy changes smoothly.

(2) Fan motor lock-up protection

When the rotational frequency feedback signal has not output for 12 seconds, (or when the microprocessor cannot
detect the signal for 12 seconds) the fan motor is regarded locked-up. Then the electric current to the fan motor is shut
off. 3 minutes later, the electric current is applied to the fan motor again. During the fan motor lock-up, the OPERATION
INDICATOR lamp flashes on and off to show the fan motor abnormality. (Refer to page 72.)

10-6. AUTO VANE OPERATION

(1) Vane motor drive

These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of
the motor are controlled by pulse signals (approx. 12V) transmitted from indoor microprocessor.

(2) The horizontal vane angle and mode changes as follows by pressing the VANE CONTROL button.

(3) Positioning

(4) VANE AUTO mode

(5) STOP (operation OFF) and ON-TIMER standby

(6) Dew prevention

The vane is once pressed to the vane stopper below to confirm the standard position and then set to the desired angle.
Confirming of standard position is performed in case of follows.
(a) When the OPERATE/STOP(ON/OFF) button is pressed. (POWER ON/OFF)
(b) When the vane control is changed AUTO to MANUAL.
(c) When the SWING is finished.
(d) When the test run starts.
(e) When the power supply turns ON.

In VANE AUTO mode, the microprocessor automatically determines the vane angle and operation to make the optimum
room-temperature distribution.

① In COOL and DRY operation

Vane angle is fixed to Angle 1.

➁ In HEAT operation

Vane angle is fixed to Angle 4.

When the following cases occur, the vane returns to the closed position.
(a) When the OPERATE/STOP (ON/OFF) button is pressed (POWER OFF).
(b) When the operation is stopped by the emergency operation.
(c) When the ON-TIMER is in standby.

During COOL or DRY operation at vane Angle 4 or 5 when the compressor cumulative operation time exceeds 1 hour,
the vane angle automatically changes to Angle 1 for dew prevention.

61

(7) SWING MODE

Released

Cold Air Prevention

75˚F 82˚F

Angle 1

Horizontal vane

Set position

PM

AM

PM

PM

By selecting SWING mode with the VANE CONTROLbutton, the horizontal vane swings vertically. The remote controller

displays “ ”.

(8) Cold air prevention in HEAT operation.

When any of the following conditions occurs in HEAT operation, the horizontal vane angle changes to Angle 1 automati-

cally to prevent cold air blowing on users.

① Compressor is not operating.

➁ Defrosting is performed.

➂ Indoor coil thermistor RT12 reads 75˚F or below.

➃ Indoor coil thermistor RT12 temperature is raising from 75˚F or below, but it does not exceed 82°F.

Indoor coil thermistor RT12 temperature

NOTE : If the temperature of RT12 reads from 75˚F to 82 ˚F at the air conditioner starting, this control works.

10-7. TIMER OPERATION

1. How to set the timer.

(1) Press OPERATE/STOP(ON/OFF) button to start the air conditioner.
(2) Check that the current time is set correctly.
NOTE : Timer operation will not work without setting the current time. Initially “AM0:00” blinks at the current time display

of TIMER MONITOR, so set the current time correctly with CLOCK SET button.

(3) Press ON/OFF TIMER buttons to select the operation.

“ON-TIMER” button... AUTO START operation (ON timer)
“OFF-TIMER” button... AUTO STOP operation (OFF timer)

(4) Press HR. and MIN. button (TIME SET button) to set the timer. Time setting is 10-minute units.

HR. and MIN. button will work when “ ” or “ ” mark is flashing.
These marks disappear in 1 minute.
After setting the ON timer, check that OPERATION INDICATOR lamp of the indoor unit lights.

NOTE1 : Be sure to place the remote controller at the position where its signal can reach the air conditioner even during

TIMER operation, or the set time may deviate within the range of about 10 minutes.

NOTE2 : Reset the timer in the following cases, or the set time may deviate and other malfunctions may occur.

● A power failure occurs.

● The circuit breaker functions.

2. Cancel

TIMER setting can be cancelled with the ON/OFF TIMER buttons.

To cancel the ON timer, press the “ON-TIMER” button.

To cancel the OFF timer, press the “OFF-TIMER” button.

TIMER is cancelled and the display of set time disappears.

PROGRAM TIMER

● The OFF timer and ON timer can be used in combination.

● “ ” and “ ” display shows the order of the OFF timer and ON timer operation.

(Example 1) The current time is 8:00 PM.

The unit turns off at 11:00 PM, and on at 6:00 AM.

NOTE : TIMER setting will be cancelled by power failure or breaker functioning.

(Example 2) The current time is 11:00 AM.

The unit turns on at 5:00 PM, and off at 9:00 PM.

62

EMERGENCY OPERATION
switch

10-8. EMERGENCY-TEST OPERATION

In case of test run operation or emergency operation, use the EMERGENCY OPERATION switch on the front of the
indoor unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of remote
controller run down. The unit will start and the OPERATION INDICATOR lamp will light.
The first 30 minutes of operation is the test run operation. This operation is for servicing. The indoor fan speed runs at
High speed and the system is in continuous operation. (The thermostat is ON.)
After 30 minutes of test run operation the system shifts to EMERGENCY COOL
75˚F.
The fan speed shifts to Med. speed.
The coil frost prevention works even in emergency operation, and defrosting cycle as well.

In the test run or emergency operation, the horizontal vane operates in VANE AUTO ( ) mode.
Emergency operation continues until the EMERGENCY OPERATION switch is pressed once or twice or the unit receives
any signal from the remote controller. In case of latter normal operation will start.

NOTE : Do not press the EMERGENCY OPERATION switch during normal operation.

• The following indication applies regardless of shape
of the indicator.

MSH09TW MSH09TW -

MSH12TN MSH12TN ­MSH15TN MSH15TN ­MSH17TN MSH17TN -

U1

U1
U1
U1

/HEAT

MODE with a set temperature of

OPERATION INDICATOR lamp

Press once

<Cool>

Press again

<Heat>

Press once again

<Stop>

EMERGENCY OPERATION
switch

63

Compressor
power
factor

Indoor unit
microprocessor

SSR61

Drive

circuit

Transistor

module

Indoor Unit

A

Indoor Unit

C

Indoor Unit

B

Gas pipe
temperature
thermistor
RT66, 67, 68

Accumulator

Comp.

H.P.S 63H2

Discharge
temperature
thermistor
RT61

Indoor Unit

A

Evaporation
temperature
thermistor
RT63

Outdoor
fan motor
MF61

x 61
x 62
x 63

Defrost
thermistor
RT62

LEV1

LEV2

LEV3

Indoor Unit

B

Indoor Unit

C

Outdoor unit control microprocessor

Compressor
primary
current

Compressor
secondary
current

Fin temperature
thermistor RT65

R. V. coil
21S4

H.P.S 63H1

Input signal

Output signal

IPM

Muffler

10-9. INVERTER MULTI SYSTEM CONTROL

MXZ30TN MXZ30TN2

64

10-10-2. Outline of main power supply circuit

1. At the start of operation
Rush current is generated the instant the electricity is turned on to the main power
supply circuit to operate the compressor.
To prevent the rush current from running into the main power supply circuit, R(Current-limiting resistor) absorbs
the rush current.
After the rush current is absorbed, X64(Relay) is ON and the circuit to R is
short-circuited, then the electricity to R is bypassed.
When X64 is ON, the system starts the operation of compressor.

2. At normal operation
The noise of alternating current of power supply is eliminated by L61(Common mode choke coil).
Then DS61(Diode stack) performs full-wave rectification of alternating current and the
alternating current is converted to direct current.
C62, C63(Smoothing capacitor) stabilizes the power supply converted to direct current from alternating current and
supplies it to IPM(Intelligent power module).
Direct current rectified by DS61 is converted to three-phase alternating current by IPM.
Microcomputer installed in the electronic control P.C. board controls frequency and voltage of three-phase alternating
current converted by IPM.
Three-phase alternating current is supplied from IPM to the compressor with frequency and voltage decided by
microcomputer based on various kinds of information.
CT61,CT62(Current transformer) measures the current of main power supply circuit.

3. Power factor improvement of power supply
Unlike inverter-less alternating current circuit, the power factor of this inverter circuit is improved by extending the period
of the current running in the circuit.

C63 is used in this circuit to supply stable direct current voltage. However, in case only SMOOTHING CAPACITOR is used
for stable supply of direct current, the power factor of power supply is lowered because the period of direct current running
in the circuit is short.
Therefore, for improvement of power factor, the circuit also uses C61(Power factor capacitor), L61(Reactor) and
DS62(Diode stack) to prepare the direct current circuit to extend the period of the current running in the circuit.

10-10-1. Outline drawing of main power supply circuit

POWER
SUPPLY

X64

L61

L1

L2

V

UW

A

K

L

NOISE FILTER
P.C.BOARD

DS61

DS62

C61

CT

61

C63

C62

+

+

-

+

-

+

-

-

R

CT62

I.P.M P.C.
BOARD

ELECTRONIC CONTROL P.C. BOARD

MC

10-10. INVERTER MAIN POWER SUPPLY CIRCUIT

MXZ30TN MXZ30TN2

65

SYMBOL
C61
C62, C63
CT61, CT62
DS61
DS62
IPM
L
L61
R

X64

NAME
POWER FACTOR CAPACITOR
SMOOTHING CAPACITOR
CURRENT TRANSFORMER
DIODE STACK
DIODE STACK
INTELLIGENT POWER MODULE
REACTOR
COMMON MODE CHOKE COIL

CURRENT-LIMITING RESISTOR

RELAY

FUNCTION
It improves the power factor of power supply.
It stabilizes the direct current voltage.
It measures the current of main power supply circuit.
It converts the alternating current voltage to direct current voltage.
It is combined with L61 to improve the power factor of power supply.
It generates three-phase alternating current and operates compressor.
It is combined with DS62 to improve the power factor of power supply.
It eliminates and absorbs the electrical noise.
It absorbs the rush current so not to run into the main power supply
circuit when the electricity is turned on.

It short-circuits the circuit to current-limiting resistor when the
compressor operates.

4. Elimination of electrical noise
Noise filter circuit is formed by L61, and the condenser installed on the noise filter P.C. board. It eliminates
the electrical noise (both common mode and normal mode noise) of alternating current power supply supplied to
main power supply circuit.
Noise filter circuit also absorbs electrical noise that is generated in the inverter circuit and prevents it from reaching
outside of the unit.

5. IPM
Six power transistors that outputs the direct current waveform as three-phase alternating current waveform, the driving
circuit which operates the power transistors, and the overcurrent detecting circuit which protects the power transistors are
built into the IPM. It can simplify and miniaturize the control circuit.

10-10-3. Function of main parts

10-11. Optimal voltage control

Target power factor minus detected power factor
(Calculated value is supposed to be "A".)

Calculation of voltage

correction value (%)

A[-2%

-2%<A<+2%
A]+2%

Previous voltage correction value minus 1
Same as previous voltage correction value
Previous voltage correction value plus 1

1 slip 0

Power factor

efficiency

The purpose of optimal voltage control is to operate the compressor at optimal
voltage that meets the load detected by the power factor of the compressor.

1. Optimal

As shown on the right the efficiency (ratio of output against input) of the
motor in the compressor becomes optimal when the sliding (ratio of differ­ence between the actual number of rotation and the number of synchronous
rotation of motor) is one fixed value. The value of sliding can be calculated
from the power factor since the sliding and the power factor are mutually
related as shown in the table on the right. To make the value of sliding so
that the efficiency of motor is optimal, the power factor of the compressor is
detected. Then the detected power factor is controlled so that its efficiency
can be high. As a result, it is possible to operate the compressor at optimal
voltage.

2. How to determine the optimal voltage

Compare the detected power factor with the target power factor so that the efficiency of motor is optimal, the voltage
correction value is changed and the optimal output voltage is determined.
Optimal output voltage[V]= Standard voltage at certain frequency [V]x voltage correction value(%)

66

When outdoor unit is operating,
some indoor units stop and
some operate.

• LEV opening for each indoor unit is determined by adding adjustment in accordance
with the number of operating unit and the capacity class to standard opening, based
on the operation frequency:
Ex.) Opening 130 pulse in standard opening 1 ➝ Minimum 80 pulse, Maximum 205
pulse. (Capacity code 4 at 1 unit operation) (Capacity code 1 at 4 units operation)

• After starting operation, adjustment in accordance with intake super heat, discharge
temperature is included in standard opening. w1

Note: LEV opening in each frequency at DRY operation and COOL operation is the

same. However, velocity and compressor operation frequency controls are
different. See 10-10 Operational frequency range.
(As far as the indoor unit velocity control goes, refer to DRY operation in
MICROPROCESSOR CONTROL in the indoor unit service manual.)

• LEV opening for each indoor unit is determined by adding adjustment in accordance
with the number of operating unit and the capacity class to standard opening, based
on the operation frequency:
Ex.) Opening 120 pulse in standard opening 1 ➝ Minimum 70 pulse, Maximum 165
pulse. (Capacity code 4 at 1 unit operation) (Capacity code 1 at 4 units operation)

• After starting operation, opening becomes the one that adjustment in accordance
with discharge temperature was added to basic opening. w1

Thermostat ON in HEAT mode

LEV opening

Thermostat OFF in

COOL or DRY mode

Thermostat OFF in HEAT mode

Stop of all indoor unit

Indoor unit status

COOL : 5 pulse (full closed)
HEAT : 59 pulse (slightly opened)

Thermostat ON in

COOL or DRY mode

Opening before stop ➝ 500 pulse in 15 minutes

When the outdoor unit operates (When the other indoor unit operate): 5 pulse.
When outdoor unit stops. (When the other indoor unit stops or thermo off):
Maintain LEV opening before stop ➝ 500 pulse in 15 minutes

• When the outdoor unit operates. (When the other indoor unit operates): 59 pulse

• When the outdoor unit stops. (When the other indoor unit stops or thermo off):
Maintain LEV opening before stop ➝ 500 pulse in 15 minutes.

w1 LEV opening when the outdoor unit is operating: Upper limit 500, Lower limit 59

10-12. LEV control

Linear expansion valve (LEV) is controlled by "Thermostat ON" commands given from each unit.

Determination of LEV standard opening in each indoor unit

• The standard opening is on the straight line, which connects an each standard point in the section where divided
into seven according to the operation frequency of compressor as shown in the figure below.
(LEV opening is controlled in proportion to the operation frequency.)

Note: Opening is adjusted at the standard opening according to the indoor unit conditions.

However, inclination of standard opening in each point of opening does not change with the original curve.

• Add opening provided in Difference in Capacity in the table below to the standard opening from 1 to 8,
when capacity of the indoor unit is excluding code 1.

• Add opening provided in Difference in Operation number in the table below to determined LEV opening for
each indoor unit, when 2 or 3 indoor units are operated at the same time.

Note: Even when the adjusted standard opening exceeds the driving range from 59 to 500 pulse, actual

driving output opening is in a range from 59 to 500 pulse.
< Calculation example of LEV opening >
Cool operation: Compressor frequency 70Hz: 2 units ON: 18 class
(170-150)p(80-60)o(70-60)+150+75-30=205 pulse

67

7 20 40 60 80 100 120 140

Operation frequency of compressor (Hz) : F

120

130

140

150

160

170

180

190

200

210

220

LEV opening (Pulse)

Standard opening

12345678

COOL

HEAT

(1) Simultaneous correction of LEV openings by suction super heat (COOL, DRY)

Suction superheat (S.H.)

LEV opening
correction (pulse)

more than 53.6

50 to53.6

46.4 to 50

42.8 to 46.4

42.8 or less

6
4
3
2
0

1 Suction super heat

(MIN gas pipe temperature thermistor - Evaporation temperature thermistor)

2 Each correction w 1

• (Each gas pipe temperature thermistor - Evaporation temperature thermistor)

w 1 Perform this, when number of operation units is 2units or more
w 2 When the correction opening of suction super heat is 0, correct the LEV opening by Discharge temperature.

3 Discharge temperature

COOL DRY HEAT

••

-

•

w 2

•

w 2

•

<Correction>

432

Code4Code3Code2

Standard opening (pulse)

Difference in
capacity

Difference in
operation number

12345678

COOL

HEAT

130
120

130
130

130
140

150
155

Capacity code

Indoor unit

2

09312415/17

170
170

180
185

180
200

190
215251550307545

-30

-10

-40

-40

-50

-50

(Correction is performed only for operating unit.)

(Suction super heat) = (Minimum gas pipe temperature) - (Evaporation temperature)

Correct the LEV openings simultaneusly as the table below

68

(2) Separate correction (COOL, DRY)

Difference of
superheat

LEV opening
correction (pulse)

more than 48.2

42.8 to 48.2

37.4 to 42.8

37.4 or less

8
6
2
0

Operation frequency
of compressor

Minimum ~ 20

21 ~ 30
31 ~ 40
41 ~ 55
56 ~ 70
71 ~ 90

91 ~ maximum

Single

123.8

134.6

149.0

152.6

158.0

161.6

165.2

Double

140.0

147.2

154.4

161.6

170.6

181.4

183.2

Triple

143.6

150.8

163.4

174.2

186.8

194.0

194.0

Single

131.0

136.4

145.4

158.0

176.0

185.0

185.0

Double

120.2

125.6

131.0

136.4

145.4

156.2

165.2

Triple

118.4

123.8

129.2

134.6

143.6

154.4

163.4

Number of operating unit. Number of operating unit.

COOL, DRY HEAT

Discharge temperature (°F)

LEV correction
opening (pulse)

more than Target discharge temperature+19.8
Target discharge temperature+19.8 to Target discharge temperature+14.4
Target discharge temperature+14.4 to Target discharge temperature+9
Target discharge temperature+9 to Target discharge temperature+3.6
Target discharge temperature+3.6 to Target discharge temperature-3.6
Target discharge temperature-3.6 to Target discharge temperature-9
Target discharge temperature-9 to Target discharge temperature-14.4
Target discharge temperature-14.4 to Target discharge temperature-19.8
Target discharge temperature-19.8 or less

COOL

10

4
2
1
0

-1

-2

-5

-8

HEAT

7
6
3
2
0

-1

-1

-3

-7

(Correction is performed only for operating unit.)
(When 2 or more units are operating.)

Correction by the separate super heat.
Correct the LEV separately by the difference between gas pipe temperature and minimum gas pipe temperature.

1 Calculate super heat using the expression below.

(Super heat) = (Each gas pipe temperature) - (Minimum gas pipe temperature)

2 Separate correction is performed according to each super heat in the table below.

(3) LEV opening correction by discharge temperature

When LEV correction output is 0 pulse by the suction super heat at COOL, DRY or HEAT operation, correct LEV is
corrected according to the following table.

The target discharge temperature is determined according to frequency zone and number of operation unit of the
compressor.

Correct the LEV opening according to difference between the target discharge temperature and discharge temperature.

69

10-13. Operational frequency range

2
3
4
4
5
6
7
8
6
7
8
9

18

20

30

52
68
85

105

110

120

33
46
73

80

90

104

25

40

58

18

22

26

70
80
86

90

110

120

70
80
86

100

100

100

49
65
80

88

100

98

1

2

3

1
1
2

1
2
1

8/10 of maximum frequency
9/10 of maximum frequency
7/10 of maximum frequency

Maximum frequency

capacity

code

DRY

(Hz)

Min. Max. Rated Min. Max.

Defrost

Rated

COOL (Hz)

HEAT (Hz)

Number of

operating

unit

Note

• Limit the maximum frequency by means

of fan speed

When all the indoor units in their operation
are running in the same operation mode and
when their fan speed is set to "Low," the
maximum frequency is limited to 6/7 the
rated frequency in the mode.

•Limit the maximum frequency by means of
operation mode

When some indoor units are operating in cool
mode while others are in dry mode, the
maximum frequency, which has the highest
frequency of all the operation mode, is limited
as the table below:

DRY COOL

10-14. Heat defrosting control

(1) Conditions to enter defrosting mode

1. When temperature of defrosting thermistor is 26.6°F or less.

2.When specified non-defrosting time, is counted in the control p.c.board is satisfied.

(Total time of compressor operating)
Going to defrosting mode at both condition of 1 and 2.

(2) Defrosting operation

1. Compressor stops for 50 seconds, Indoor fan is off, Defrosting lamp lights

2.4-way valve reverses flow, Compressor operates by the frequency in heat defrosting control.

3. After compressor stops for 35 seconds, 4-way valve reverses flow, then defrosting finishes.

(3) Conditions to finish defrosting mode

1. When the defrosting thermistor temperature is 46.4°F or more.

2. When it has spent 10 minutes for defrosting.
Defrosting finishes at condition of 1 or 2.

10-15. High pressure protection

(1) High pressure protection control on heat mode

Temperature of the main pipe temp. thermistor in the indoor unit controls the operation frequency.
When temperature of the main pipe temp. thermistor is approx. 120.0°F, the operation frequency is set at the current level.
When temperature of the main pipe temp. thermistor is approx. 125.6°F the protection control decreases the frequency at the
speed of 3Hz a minutes.
When temperature of the main pipe temp. thermistor is approx. 134.6°F the protection decreases the frequency at the speed
of 4Hz a minute and changes the outdoor fan to Low.

Note:Temperature of the pipe temp. thermistor is different depending on the indoor unit.

Temperature of the pipe temp. thermistor is 113°F or less, the protection control is Released.

(2) High pressure protection control by high pressure switch (H.P.S 63H1)

High-pressure switch controls the operation frequency and outdoor fan motor.
<Control status>
When high-pressure switch is ON.
(When discharge pipe pressure is 398.8 PSIG or more.)
<Control details>
(a) When cooling or drying

The protection control decreases the compressor frequency at the speed of 10Hz a minute.
(The compressor operates continuously in min. frequency according to a command to decrease more than the min. level.)

(b) When heating

The protection control decreases the compressor frequency at the speed of 10Hz a minute.
The protection control changes the outdoor fan to Low.

70

<Release status>

COOL

Fan speed

Up

Down

Up

Down

Single Double Triple

Mode

HEAT

Indoor unit operation

<Relation between compressor frequency and fan speed.>

55 Hz
45 Hz
60 Hz
50 Hz

50Hz
45 Hz
45 Hz
40 Hz

50 Hz
45 Hz
40 Hz
35 Hz

Up

Down

Fan speed

Hi

Low

Compressor frequencyMin. Max.

When high-pressure switch is OFF. (When discharge pipe pressure is 340.8 PSIG or more.)
Or, the compressor stops.

10-16. Discharge temperature protection control

This protection controls the compressor ON/OFF and operation frequency according to temperature of the discharge temp.
thermistor.

(1) Compressor ON/OFF

When temperature of the discharge temp. thermistor exceeds 240.8°F, the control stops the compressor.
When temperature of the discharge temp. thermistor is 212°F or less, the controls starts the compressor.

(2) Compressor operation frequency

When temperature of the discharge temp. thermistor is expected to be higher than 240.8°F, the control decreases 12Hz from
the current frequency.
When temperature of the discharge temp. thermistor is expected to be higher than 231.8°F and less than 240.8°F, the con­trol decreases 6Hz from the current frequency.
When temperature of the discharge temp. thermistor is expected to be higher than 219.2°F and less than 231.8°F, the con­trol is set at the current frequency.

10-17. Refrigerant recovery control on heating

<Control status>

The control performs when the all following status are satisfied;

• When there is 1 unit or more not operating indoor unit on heat operation. (Excluding thermo OFF)

• When discharge temperature becomes 224.6°F or more.

• When it passed 60 minutes or more since the operation has started or the last refrigerant recovery has controlled.

<Control details>

LEV opening, which adjusts to not operating indoor unit, is considered to be 80 pulse.

<Control finish status>

The control finishes either as follows. However, the LEV opening is considered to be 59 pulse.

• When it passed 60 seconds since the control has started.

• When the discharge temperature is 194°F or less.

10-18. Outdoor fan control

Fan speed is switched according to a number of operating indoor unit and the compressor frequency.

Note

• When operation, fan speed of High/ Low mode changes to Very High/ High mode by promoting those fan speeds respec­tively by 1 step after defrosting is operated. This control is cleared, when the compressor off.

•When overheat protection of P.C. board temperature or fin temperature operates, the outdoor fan speed is fixed to Very High
mode regardless of compressor frequency. Also, when the overheat protection is cleared, the fan speed is back to normal

•When the indoor coil thermistor is 134.6°F or more on HEAT operation, fan speed is fixed to Low notch .
Or, the indoor coil thermistor is 113°F or less on HEAT operation, fan speed is back to normal.

71

Discharge temperature
thermistor

Purpose

Protection
Defrosting

Protection
Defrosting

Control

Control
Protection
Protection

Control

Compressor LEV

Outdoor
fan motor

4-way

valve

Sensor

Defrost thermistor

Fin temperature
thermistor

Indoor pipe temperature
thermistor

Capacity code

Evaporation temperature
thermistor
Gas pipe temperature
thermistor
High pressure
switch

Actuator

10-19. Relation between main sensor and actuator

Relation between main sensor and actuator.

11

MSH09TW
MSH12TN
MSH15TN
MSH17TN

SERVICE FUNCTIONS

MSH09TW ­MSH12TN ­MSH15TN ­MSH17TN -

U1

MUH09TW

U1

MUH12TN

U1

MUH15TN

U1

MUH17TN

11-1. COMPULSORY DEFROSTING MODE FOR SERVICE

By short circuit of the connector JP607 and R853 on the outdoor deicer P.C. board, defrosting mode can be accom­plished regardless of the defrost interval restriction. (Refer to page 96.)

Defrost thermistor RT61 must read below 27°F(MSH09TW,MSH12/15/17TN)/ 32°F(MSH09TW

U1

). (Refer to page 73.)

11-2. CHANGE IN DEFROST SETTING ✳MXZ30TN and MXZ30TN2 is not equipped with this function.

<MSH09TW, MSH12/15/17TN>

<JPC> When the JPC wire of the deicer P.C. board is cut, the defrost interval time is changed.

<JPE> When the JPE wire of the deicer P.C. board is cut, the defrost temperature is changed. (Refer to page 96.)

Model

MUH09TW
MUH12TN
MUH15TN

MUH17TN

Jumper wire Change point

JPC

JPE

MUH09TW ­MUH12TN ­MUH15TN ­MUH17TN -

U1

MUH12TN -

U1

MUH15TN -

U1

U1

U2

MXZ30TN

U2

MXZ30TN2

U1

- ,MSH12/15/17TN-

Defrost interval time changes from 40 minutes to 15minutes.

Defrost start temperature changes from 27˚F to 32˚F.
Defrost finish temperature changes from 38˚F to 50˚F.

72

<MUH09TW- , MUH12/15/17TN- , MUH12/15TN- >

U2U1U1

<JPC> When the JPC wire of the deicer P.C. board is soldered, the defrost interval time is changed.
<JPE> When the JPE wire of the deicer P.C. board is soldered, the defrost temperature is changed. (Refer to page 96.)

Model

MUH09TW - MUH12TN ­MUH12TN - MUH15TN ­MUH15TN ­MUH17TN -

U1
U1

Jumper wire Change point

U2U1
U2U1

JPC

JPE

Defrost interval time changes from 15 minutes to 40 minutes.

Defrost start temperature changes from 32˚F to 27˚F.
Defrost finish temperature changes from 50˚F to 38˚F.

11-3. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board.
The time will be shortened as follows. (Refer to page 94 or 95.)

Set time : 1 minute ➔ 1-second
Set time : 3 minutes ➔ 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time

is shortened by short circuit of JPG and JPS.)

11-4. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be

modified according to the indoor unit number.

How to modify the remote controller P.C. board

Remove batteries before modification.
The board has a print as shown below :

NOTE : For remodelling, take out the bat-

teries and press the
OPERATE/STOP(ON/OFF)button
twice or 3 times at first.
After finish remodelling, put back
the batteries then press the
RESET button.

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.
After modification, press the RESET button.

73

C111

CN201

C11

CN211

IC152

CN151

SW1

CN112

CN121

IC101

CN111

JR07

Table 1

No. 1 unit
No. 2 unit
No. 3 unit
No. 4 unit

1 unit operation
No modification

–
–
–

2 units operation

Same as at left

Solder J1

–
–

3 units operation

Same as at left
Same as at left

Solder J2

–

4 units operation

Same as at left
Same as at left
Same as at left

Solder both J1 and J2

CN104

JHA

CN102

CN112

CN113

CN151

CN101

BZ

SW

IC101

RA102

CN201

How to set the remote controller exclusively for particular indoor unit

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the
remote controller for the indoor unit.
The indoor unit will only accepts the signal from the remote controller that has been assigned to the indoor unit once they are
set. The setting will be cancelled if the breaker has turned off, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.

11-5. AUTO RESTART FUNCTION

When the indoor unit is operated with the remote controller, the signals of the operation mode, the set temperature,
and the fan speed are sent from the indoor electronic control P.C. board and memorized in the auto restart assembly.
When the main power is turned off and then turned back on, the unit restarts automatically in the memorized set
conditions approximately after 3 minutes.

How to release “AUTO RESTART FUNCTION”

1 Turn off the main power for the unit.
2 Pull out the indoor electronic control P.C. board and the display P.C.board. (Refer to page 102 or 104.)
3<MSH09>

Solder the Jumper wire or the Resistor 220Ω to the JR07 on the indoor electronic control P.C.board. (Refer to page 94.)

<MSH12/15/17>

Disconnect the AUTO RESTART ASSY from CN104, and solder the Jumper wire to JHA on the indoor electronic control
P.C. board.(Refer to page 95.)

Operation

1 If the main power (115V AC) has been cut, the operation settings remain.
2 After the power is restored, the unit restarts automatically according to the memory. (However, it takes at least 3 minutes

for the compressor to start running.)

MSH09

MSH12/15/17

NOTE:

•The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote

controller.

•If the main power is turned off or a power failure occurs while AUTO START/STOP timer is active the timer setting is

cancelled.

•If the unit has been off with the remote controller before power failure, the auto restart function does not work as the

power button of the remote controller is off.

•To prevent breaker off due to the rush of starting current, systematize other home appliances not to turn on at the same time.

•When some air conditioners are connected to the same supply system, if they are operated before power failure, the

starting current of all the compressors may flow simultaneously at restart.
Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current
by adding system that allows the units to start one by one.

74

12

Insert the negative pole
of the batteries first.
Check if the polarity of
the batteries are correct.

RESET button

Lead wiring

Housing point

TROUBLESHOOTING

MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW -

MSH12TN -

MSH15TN -

MSH17TN -

U1

MUH09TW

U1

MUH12TN

U1

MUH15TN

U1

MUH17TN

MUH09TW ­MUH12TN ­MUH15TN ­MUH17TN -

U1

MUH12TN -

U1

MUH15TN -

U1

U1

MXZ30TN

U2

MXZ30TN2

U2

12-1. Cautions on troubleshooting

1. Before troubleshooting, check the following:

1) Check the power supply voltage.

2) Check the indoor/outdoor connecting wire for mis-wiring.

2. Take care the following during servicing.

1) Before servicing the air conditioner, first be sure to turn off the remote controller to stop the unit, and then after con­firming the horizontal vane is closed, turn off the breaker and/or disconnect the power plug.

2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic
control P.C. board.

3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.

4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

3. Troubleshooting procedure

1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.
To make sure, check how many times the abnormality indication is flashing on and off before starting service work.

2) Before servicing check that the connector and terminal are connected properly.

3) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and
the components for bursting and discoloration.

4) When troubleshooting, refer to the flow chart on page 76, 77 and the check table on page 78, 79, 80.

4. How to replace batteries

Weak batteries may cause the remote controller malfunction.
In this case, the remote controller can be repaired only by the battery replacement. To operate the remote controller nor­mally, replace the batteries in the following order.
This remote controller has the RESET button. After refilling new batteries, press the RESET button with tip end of ball
point pen or the like, and then use the remote controller.

1 Remove the front lid and replace batteries.

Then re-attach the front lid.

NOTE : If the RESET button is not pressed, the remote controller may not operate correctly.

2 Press the RESET button.

75

12-2. Instruction of troubleshooting

Start

Indoor unit
operates.
Outdoor unit
doesn't
operate.

Indoor unit
doesn't receive
the signal from
remote controller.

OPERATION INDICATOR
lamp on the indoor unit is
flashing on and off.

Outdoor unit
operates in
only Test Run
operation.

Outdoor unit
doesn't
operate
even in
Test Run
operation.

Indoor unit
operates, when
the EMERGENCY
OPERATION
switch is pressed.

Indoor unit
doesn't operate,
when the
EMERGENCY
OPERATION
switch is pressed.

Check room
temperature
thermistor.
Refer to
"Test point
diagram and
voltage" on
page 94, 95.

Refer to D
"Check of
outdoor unit"
on page 86.

Refer to B
"Check of
remote controller
and receiver
P.C. board"
on page 84.



Flash on and off at

0.5-second interval
Cause:
Indoor/ Outdoor unit

• Mis-wiring

2-time flash
Cause:
Indoor unit

• Trouble of room
temperature/ indoor
coil thermistor

3-time flash
Cause:
Indoor unit

• Trouble of indoor
fan motor

6-time flash
Cause:
Outdoor unit

• Trouble of thermistor
in outdoor unit

Refer to F "How to check mis-wiring and
sirial singal error (When outdoor unit
doesn't operate)" on page 87.
❈1

Check room temperature
thermistor and indoor coil
thermistor.
Refer to "Test point
diagram and voltage"
on page 94, 95.

1-time flash
Cause:
Indoor/Outdoor unit

• Trouble of
serial signal

Refer to A
"Check of
indoor fan
motor"
on page 83.

1. Check indoor /
outdoor
connecting wire.

2. Refer to C
"Check of indoor
electronic control
P.C. board"
on page 85.

Outdoor
unit doesn't
stop even
if indoor unit
stops.

Unit doesn't
operate
normal
operation in
COOL or
HEAT mode.

Refer to E
"Check of
outdoor unit"
on page 86.

Refer to H
"Check of
R.V. coil"
on page 88.

Refer to G
"Check of
outdoor
thermistor"
on page 88.

Indoor unit
operates.
Outdoor unit
doesn't operate
normally.

MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW ­MSH12TN ­MSH15TN ­MSH17TN -

MUH09TW

U1

MUH12TN

U1
U1

MUH15TN

U1

MUH17TN

MUH09TW ­MUH12TN ­MUH15TN ­MUH17TN -

U1

MUH12TN -

U1

MUH15TN -

U1
U1

U2
U2

❈1<The case of the trouble of the serial signal>

When the power is turned off and then turned on again, the indication shows “the trouble of mis-wiring.”

76

MXZ30TN MXZ30TN2 only

Operation start

Check the outdoor unit
LED indicator

I Check of power supply
See page 89.

• Indoor unit
serial signal
error
J Check of
serial signal
See page 89.

• COOL or HEAT
operation only
K Check of
R.V.coil
See page 90.

• When cooling,
room does not
cool.
M Check of
inverter,
compressor
See page 91.

• When cooling, heat
exchanger of
non-operating indoor
unit frosts.

•When heating, non
operating indoor unit
gets warm.
L Check of LEV
See page 91.

• When cooling,
dew drops in the
non-operating
indoor unit
Check of mis­piping.

• When heating,
room does not get
warm.
M Check of
inverter,compressor
See page 91.
Check mis-piping
Shortage of capacity

Refer to indicator list
See page 79, 80.

OFF

"00"

• Check the indoor unit with referring to the indoor unit service manual, and confirm that there is any problem in the indoor unit.
Then, check the outdoor unit with referring to this page.

Display other than "00"

77

1. Troubleshooting check table

Operation Indicator

flashing

· Flashing of the OPERATION INDICATOR lamp (on the left-hand side)
indicates possible abnormalities.

· The OPERATION INDICATOR lamp (on the left-hand side) is lighted during
normal operation.

• The following indication applies regardless of shape of the indicatior.

MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW ­MSH12TN ­MSH15TN ­MSH17TN -

U1

MUH09TW

U1

MUH12TN

U1

MUH15TN

U1

MUH17TN

MUH09TW ­MUH12TN ­MUH15TN ­MUH17TN -

U1

MUH12TN -

U1

MUH15TN -

U1
U1

U2
U2

Before taking measures, make sure that the symptom reappears, for accurate troubleshooting.
Self check table

NO.

Abnormal

point

Indication

Symptom

Detect method

Check point

Mis-wiring

1

Serial sig­nal

Indoor coil
thermistor

2

Room
tempera­ture ther­mistor

Indoor fan

3

motor

0.5-second ON

0.5-second OFF

1-time flash

2.5-second OFF

2-time flash

2.5-second OFF

<MSH09>

3-time flash

2.5-second OFF

Outdoor unit
does not run.

Outdoor unit
does not run.

Indoor fan
repeats 12 sec­onds ON and 3
minutes OFF.
When the indoor
fan breaks, the
fan keeps stop­ping.

When the unit operates by the
remote controller or emer­gency operation switch at 3
minutes after the main power
supply is turned on.

When serial signal from out­door unit stops for 4 to 5 sec­onds.

Detects Indoor coil/ room tem­perature thermistor short or
open circuit every 8 seconds
during operation.

When rotational frequency
feedback signal is not emit
during 12-second indoor fan
operation.

● Check wiring (visual check and conductiv­ity check).

● Check indoor electronic control P.C.
board.

● Check outdoor DEICER P.C. board.

● Check electrical parts.

● Check resistance of thermistor.

● Re-connect connector.

● Check indoor electronic control P.C.

board.

● Disconnect connector CN211 and then

check connector CN121 - to make
sure rotational frequency feedback signal
of 1.5V or over exists.

● Check indoor electronic control P.C.

board.

● Check indoor fan motor.

● Re-connect connector.

2

3

6-time flash

Outdoor

4

thermistor

2.5-second OFF

Outdoor unit
does not run

When the outdoor thermistor
shorts or opens after the com­pressor start-up.

78

● Check deicer P.C. board.

● Check resistance of thermistor.

MXZ30TN MXZ30TN2

Note . LED indicates "00" in the normal status.

7-segment LED display

00

❈

If there is defect in the following parts(electronic control P.C. board, relay P.C. board, high pressure
switches(63H1,63H2),indoor /outdoor fan motor , or indoor coil thermistor), the compressor may stop even with the display
remained at “ 00 “.In any case, reset the breaker and check the above-stated parts.

Symptom Outdoor unit does not operate.

Display Abnormal Detecting method Check points

aa44

(A4)

Outdoor power system abnor­mality

When the compressor operation has been interrupted by overcurrent
protection continuously three times within 1 minute after start-up, the
compressor stops operation.

Error mode

Normal

• Inverter output

• Compressor

aa33

(A3)

Symptom Outdoor unit stops and restarts every 3 minutes.

Display Abnormal Detecting method Check points

ee99

(E9)

ee66

(E6)

ff88

(F8)

aa88

Outdoor electronic control P.C.
board abnormality

Evaporation temperature ther­mistor abnormality

Discharge temperature ther­mistor abnormality

Fin temperature thermistor
abnormality

Overcurrent protection

(A8)

dd66

(d6)

dd44

(d4)

dd77

Discharge temperature over­heat protection

Fin temperature overheat pro­tection

High pressure protection

(d7)

ff55

(F5)

ff66

(F6)

ff77

(F7)

Room-A gas pipe temperature
thermistor abnormality

Room-B gas pipe temperature
thermistor abnormality

Room-C gas pipe temperature
thermistor abnormality

When the nonvolatile memory data cannot be read properly on the out­door controller board

The compressor stops when a short or open circuit occurs in the evap­oration temperature thermistor during compressor running.

The compressor stops when a short or open circuit occurs in the dis­charge temperature thermistor during compressor running.

The compressor stops when a short or open circuit occurs in the fin tem­perature thermistor during compressor running.

When over current is applied to the power module, the compressor
stops and restarts in 3 minutes.

When the discharge temperature thermistor detects 240.8°F or above,
the compressor stops and restarts operation in 3 minutes.
(Protection will be released at 212°F or below.)

When the fin temperature thermistor detects 192.2°F or above, the com­pressor stops and restarts operation in 3 minutes.

When the compressor starts, primary current or output voltage stops the
compressor and restarts in 3 minutes.

When a short or open circuit occurs in the Room-A gas pipe
temperature thermistor.

When a short or open circuit occurs in the Room-B gas pipe
temperature thermistor.

When a short or open circuit occurs in the Room-C gas pipe
temperature thermistor.

• Outdoor electronic control P.C. board

• Check the characteristic of the evapora­tion temperature thermistor. Refer to

on page 90.

• Check the contact of P. C. board con­nectors.

• Check the characteristic of the discharge
temperature thermistor. Refer to KKon
page 90.

• Check the contact of P. C. board con­nectors.

• Check the characteristic of the fin temper­ature thermistor. Refer toKKon page 90.

• Check the contact of P.C. board connec­tors.

• Check the inverter and compressor.
Refer to JJon page 89.

• Check the amount of gas.

• Check the indoor/outdoor air flow for
short cycle.

• Check the indoor unit air filter for
clogging.

• Check the amount of gas and the refriger­ant cycle.

• Check the outdoor unit air passage.

• Check the outdoor unit air passage.

• Check the power module.

• Check the outdoor fan motor. Refer to
on page 91.

• Amount of gas

• Outdoor unit air passage.

• Check the ball valve.

• Room Agas pipe temperature thermistor
characteristic.

• Contact of P.C. board connectors.

• Room B gas pipe temperature thermistor
characteristic.

• Contact of P.C. board connectors.

• Room C gas pipe temperature thermistor
characteristic.

• Contact of P.C. board connectors.

KK

LL

79

Symptom Outdoor unit operates. (The compressor operates at reduced frequency.)

P

RED BLK

WHT

Display Abnormal Detecting method Check points

dd88

(d8)

dd99

(d9)

dd77

(d7)

dd66

(d6)

Frequency drop by current
protection

Frequency drop by overload
protection

Frequency drop by high pres­sure protection

Frequency drop by defrosting
in cooling

Frequency drop by discharge
temperature protection

When the outdoor unit input current exceeds 22.5 A, the compressor
operates at reduced frequency.

When the compressor load exceeds the specified value, the compres­sor operates at reduced frequency.

When indoor pipe temperature exceeds 131°F during heating, the com­pressor operates at reduced frequency.

When the indoor pipe temperature falls to 42.8°F or below during cool­ing, the compressor operates at reduced frequency.

When the discharge temperature exceeds 230°F, the compressor oper­ates at reduced frequency.

These symptoms do not mean any
abnormality of the product, but check the

following points.

• Air filter clogging.

• Amount of gas.

• Short cycle of indoor/outdoor air flow.

dd33

(d3)

(d1)

Symptom Outdoor unit operates.

Display Abnormal Detecting method Check points

Frequency drop by high pres­sure switch (63H1) protection

Low discharge temperature

dd11

protection

ee77

Defrost thermistor abnormality

(E7)

hh44

(h4)

Power factor detection abnor­mality

When the high pressure exceeds 398 PSIG, the compressor operates
at reduced frequency. In addition, the fan speed changes.

When the state with low discharge temperature of which 122°F in COOL
and 119.3°F or less in HEAT for 20 minutes, the compressor operates
continuously.

When a short or open circuit occurs in the defrost thermistor during
heating
* In this case, the compressor continues to operate.

When the compressor power factor cannot be detected
* In this case, the compressor keeps running.

• Amount of gas.

• Outdoor unit air passage.

Check the amount of gas.

• Replace the outdoor controller board.

• Check the contact of LEV board connec­tors.

• Defrost thermistor characteristic.

• Contact of P. C. board connectors.

• Compressor wiring.

2. Trouble criterion of main parts

MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW ­MSH12TN ­MSH15TN ­MSH17TN -

Part name

Room
temperature
thermistor(RT11)

Indoor coil
thermistor(RT12)

Defrost
thermistor(RT61)

U1

MUH09TW

U1

MUH12TN

U1

MUH15TN

U1

MUH17TN

MUH09TW ­MUH12TN ­MUH15TN ­MUH17TN -

Check method and criterion

Measure the resistance with a tester. (Part temperature 50°F ~ 86°F)

Normal

8kΩ ~ 20kΩ

Measure the resistance with a tester.
(Part temperature 14°F ~ 104°F)

U1

MUH12TN -

U1

MUH15TN -

U1
U1

Abnormal

Open or short-circuit

U2
U2

Figure

Ambient temper-

ature thermistor

(RT63)

MSH09TW ­MSH12/15/17TN -

only

Compressor(MC)

MUH09TW
MUH12/15/17TN

OPEN 302
CLOSE

203

U1

°F i 9°F

°F i 18°F

U1

Measure the resistance between the terminals with a tester.
(Part temperature14°F ~ 104°F)

C-R
C-S

5kΩ ~ 60kΩ

0.7~0.9Ω

1.3~1.6Ω

Normal

MUH12/15

1.4~1.9Ω

2.4~3.0Ω

Abnormal

Open or short-circuit

Normal

MUH17MUH09

1.4~1.8Ω

2.3~2.9Ω

80

Abnormal

Open or

short-circuit

1
2
3

RED

YLW
GRY
BRN

WHT

MAIN

AUX.

1
2
3

BLK

FUSE

RED

ORN

BLU

BLK

MAIN

WHT

YLW

AUX.1

BRN

AUX.2
AUX.3

AUX.4

FUSE

RED

AUX.

MAIN

BLK

WHT

P

RED
ORN

BLK

WHT

P

AUX.

MAIN

RED

YLW

BRN

ORN

GRN

ROTOR

YLW

RED

BLU

ORN

PNK

ROTOR

MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW ­MSH12TN ­MSH15TN ­MSH17TN -

U1
U1
U1
U1

MUH09TW
MUH12TN
MUH15TN
MUH17TN

MUH09TW ­MUH12TN ­MUH15TN ­MUH17TN -

U1

MUH12TN -

U1

MUH15TN -

U1
U1

U2
U2

Part name

Indoor fan
motor(MF)

MSH09TW

MSH09TW -

U1

CUT OFF
262°F

MSH12/15/17TN
MSH12/15/17

U1

-

TN

CUT OFF
293°F

Outdoor fan
motor(MF)

OPEN

302

°F i 9°F
CLOSE
203

°F i 18°F

Check method and criterion

Measure the resistance between the terminals with a tester.
(Part temperature 50°F ~ 86°F)

Normal
MSH09

Motor partSensor partMotor part

WHT-BLK
BLK-RED

76~83 Ω
70~76 Ω

Measure the voltage Power ON.

BRN-YLW
YLW-GRY

Normal

MSH09

4.5 ~ 5.5V

(When fan revolved one time)

0V➔5V➔0V (Approx.)

Abnormal

Remain 0V or 5V

Normal

WHT-BLK
BLK-YLW
YLW-BLU
BLU-BRN

MSH12/15

65~72Ω

8~10Ω

4~6Ω

5~7Ω

28~31Ω

MSH17

52~57Ω
10~12Ω

4~5Ω
5~6Ω

35~39

ΩBRN-RED

Measure the resistance between the terminals with a tester.
(Part temperature14°F ~ 104°F)

Normal

WHT-BLK
BLK-RED

MUH09

54~67Ω
58~72Ω

MUH12

116~143Ω
215~264Ω

MUH15

102~126Ω

97~120Ω

MUH17

60~75Ω
77~96Ω

Measure the resistance between the terminals with a tester.
(Part temperature 50°F ~ 86°F)

Abnormal

Open or

short-circuit

Abnormal

Open or

short-circuit

Abnormal

Open or

short-circuit

Figure

MSH09

MSH12/15/17

MUH09/12

MUH15/17

MSH09

MSH09

Vane motor(MV)

BRN-other one

282 ~ 306Ω

Normal

MSH12/15/17

RED-other one

358 ~ 388Ω

81

Abnormal

Open or

short-circuit

MSH12/15/17

PP

:INNER PROTECTOR

W

U

V

WHT

RED

BLK

WHT

BLK

P

ORN
BLU

RED
YLW

LEV

WHT

RED

YLW

BRN

ORN

BLU

MXZ30TN MXZ30TN2

Part name

Defrost
thermistor
Evaporation/ Gas
pipe temperature
thermistor

Discharge
temperature
thermistor

Compressor

Measure the resistance using a tester.
(Part temperature 14°F ~ 104°F)

Measure the resistance using a tester, after warming up the thermistor by holding by
hand.
(Part temperature : 68°F ~ 104°F)

Measure the resistance between terminals using a tester.
(Winding temperature : 14°F ~ 104°F)

Check method and criterion

Normal

abnormal

5kΩ ~ 55kΩ Open or short-circuit

Normal

abnormal

100kΩ ~ 250kΩ Open or short-circuit

Normal abnormal

1Each phase 0.53Ω ~ 0.66Ω Open or short-circuit

Figure

Outdoor fan
motor
OPEN

275

°F i 9°F

CLOSE
187

°F i 27°F

R. V. coil

Linear expansion
valve

Measure the resistance between lead wires using a tester.
(Part temperature : 14°F ~ 104°F)

WHT - BLK

BLK - YLW
YLW - BLU
RED - BLK

Normal

69.0Ω ~ 86.0Ω

23.0Ω ~ 30.0Ω

10.0Ω ~ 13.0Ω

73.0Ω ~ 91.0Ω

abnormal

Open or

short-circuit

(Not including

WHT - ORN)

Measure the resistance using a tester. (Part temperature 14°F ~ 104°F)

Normal abnormal

1640Ω ~ 2310Ω Open or short-circuit

Measure the resistance using a tester.(Part temperature 14°F ~ 104°F)

Lead wire color Normal

Abnormal
WHT - RED
RED - ORN

YLW - BRN

37.4 ~ 53.9Ω

Open or short-circuit

BRN - BLU

Measure the resistance using a tester.
(Part temperature 14°F ~ 104°F)

High pressure
switch (HPS)

HPS1 340.8 ± 21.8PSIG
HPS2 369.8 ± 29 PSIG
HPS1 398.8 PSIG
HPS2 497.5 PSIG

Pressure

Operation OFF

+

­+

-

7.3

14.5
0

21.8

82

Normal abnormal

Short

Other than

those

listed at

Open

left

P Inner protector

Indoor fan does not operate.

AA

Check of indoor fan motor

Turn OFF the power supply.
Check connector (Fan motor) visually.

No

Are lead wires connected?

Re-connect the lead wires.

Yes

Disconnect lead wires from connector (Fan motor).
Measure resistance between lead wires No.1 and No.3 and then No.2 and No.3 (MSH09).

Is resistance 0 (short circuit) or ∞ (open circuit)?

Yes ( 0 or ∞ )

Repair or replace the indoor fan motor.

{

No.1 and No.4 and then No.3 and No.4 (MSH12/15/17).

No

(others)

No

Is soldered point of the connector

correctly soldered?

MSH12/15/17

MSH09

Replace the indoor electronic con­trol P.C. board.

Insert screwdriver into air outlet and
rotate indoor fan (motor) slowly for
1 revolution or more, and measure
voltage between CN 121 1-2 .

Does voltage repeat 0V
DC and more than 5V?

Yes

No

Re-solder it.

}

Yes

83

Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller.

w Check if the remote controller is exclusive for this air conditioner.

w

In case of replacing the receiver P.C. board of MSH09, replace the indoor electronic control P.C. board with it because they are unified.

BB

Check of remote controller and receiver P.C. board

Switch on the remote controller.

Is LCD display on the remote con­troller displayed?

Yes

Remove the batteries, then set them back
and press the RESET button. Check if the
unit operates with the remote controller.

Does the unit operate with the
remote controller?

Yes

OK

Connect properly.

No
(not clear)

No

No

No

Replace the batteries.(Refer to page 75.)

Turn on a radio to AM and press switch on
the remote controller.

Is noise heard from radio?

Yes

Are there any fluorescent lights of
inverter or rapid-start type within
the range of 3.28ft.?

No

MSH12/15/17

Is the connector connecting receiver
P.C. board and indoor electronic con­trol P.C. board properly connected?

Yes

Replace the receiver P.C. board.

Does the unit receive signal of
ON/OFF with the remote controller
and emit a beep tone?

Yes

OK

No

Yes

Replace the remote controller.

● Re-install the unit away from lights.

● Attach a filter on receiving part.

MSH09

Replace the power monitor, receiver
P.C. board with the indoor electronic

control P.C. board.

Connect properly.

Replace the indoor electronic
control P.C. board.

No

No

No

Is auto restart assembly properly
connected ?

Yes

Replace the auto restart assembly.

Does the unit receive signal of
ON/OFF with the remote controller and
emit a beep tone?

Yes

OK

Does the unit receive signal of
ON/OFF with the remote controller
and emit a beep tone?

Yes

OK

84

Check the both “parts side” and “pattern
side” of indoor electronic control P.C.
board visually.

Replace the fuse.

Is fuse (F11) blown?

Be sure to check both fuse
and varistor in any case.

Replace the fan
motor.

Replace the indoor
electronic control
P.C. board.

Is winding
resistance of
fan motor 0 "?

Is winding
resistance of
vane motor 0 "?

No

Yes

Replace the vane
motor.

No

Yes

Yes

Is varistor (NR11) burnt?

Replace the varistor.

Yes

Turn OFF the power supply.
Disconnect indoor fan motor connector CN211(MSH09
only) and vane motor connector CN151 from the indoor
electronic control P.C. board and turn ON the power supply.

No

No

Does the unit operate with the remote controller or
the OPERATION INDICATOR lamp light up
by pressing the EMERGENCY OPERATION switch?

Yes

No

Be sure to check both resistances.

Turn OFF the
power supply.

Turn OFF the
power supply.

The unit doesn’t operate with the remote controller.
Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.

CC

Check of indoor electronic control P.C. board

85

After 30 seconds,
does compressor stop?

No

Yes

Replace the deicer P.C. board.

Yes

1 Turn OFF the power supply.
2 After 30 seconds, turn ON the power supply again.
3 Operate the unit in COOL or HEAT mode by

pressing the EMERGENCY OPERATION switch for 1 minute or more.
4 Stop it by pressing the EMERGENCY OPERATION switch twice or once.

Ok

No

After 30 seconds, does
outdoor fan motor stop?

Replace the deicer P.C. board.

Yes

Ok

No

Rectify the connecting wire.

Is there 115V AC (MSH09),208/230V AC
(MSH12/15/17) to terminal block between
3 (MSH09/12), COM (MSH15/17)on the
compressor contactor(52C) and N (MSH09)
L2 (MSH12/15/17) on the outdoor
terminal block?

Is there 115V AC (MSH09),
208/230V AC (MSH12/15/17) between
4 on the compressor contactor (52C)
(MSH09/12), TAB21(MSH15/17) and
TAB20 on the deicer P.C. board?

Yes

Rectify the indoor and
outdoor connecting wire.

Rectify the connecting wire.

No

Yes

Compressor
doesn't operate.

Yes

Yes

Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch.
3-minute time delay works.
Test run operation operates for 30 minutes.

Outdoor fan motor
doesn't operate.

No

Rectify the indoor and
outdoor connecting wire.

Rectify the connecting wire.

Check the compressor and compressor capacitor, and rectify the connecting wire.

Start

Yes

Is there 115V AC (MSH09),
208/230V AC (MSH12/15/17) between
4 on the compressor contactor (52C)
(MSH09/12), TAB21(MSH15/17) and
TAB20 on the deicer P.C. board?

Is there 115V AC(MSH09), 208/230V AC
(MSH12/15/17) to terminal block between
L1 - N (MSH09), L1 - L2 (MSH12/15/17)?

Replace the deicer P.C. board.

Replace the deicer P.C. board.

No

No

Yes

Yes

No

Check the outdoor fan motor and
rectify the connecting wire.

Replace the deicer P.C. board.

No

No

Yes

Is there 5V DC between J8 –J9
on the deicer P.C. board?

+

–

Is there 5V DC between J8 –J9
on the deicer P.C. board?

+

–

Is there 115V AC (MSH09),208/230V AC
(MSH12/15/17) to terminal block between
3 (MSH09/12), COM (MSH15/17)on the
compressor contactor(52C) and N (MSH09),
L2 (MSH12/15/17)on
the outdoor terminal block?

Is there 115V AC(MSH09), 208/230V AC
(MSH12/15/17) to terminal block between
L1 - N (MSH09), L1 - L2 (MSH12/15/17)?

Compressor and/or outdoor fan does not operate. (Only indoor fan operates.)

DD

Check of outdoor unit

Compressor and/or outdoor fan motor doesn’t stop.

EE

Check of outdoor unit

86

When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second or flashes once.
Outdoor unit doesn’t operate.

FF

How to check mis-wiring and serial signal error

Start

Turn OFF the power supply.

Turn ON the power supply.

Rectify the wiring.

Correct the mis-wiring.

No

Is the power voltage to terminal blocks of
indoor/outdoor units normal?

Yes

Turn ON the EMERGENCY OPERATION switch.

After 3 minutes that power supply has
been turned on, does the compressor
start operating?

(any mode possible)

No

No

Is the terminal blocks11and33on the
indoor unit properly connected to their
counter parts on outdoor unit?

Yes

Turn OFF the Power supply.
Check by using Checking Mode.

11

Disconnect indoor/outdoor wiring (at indoor terminal blocks

and 33)

22

Short circuit between indoor terminal blocks 11and 33.

Turn ON the Power supply.

33

While pressing OPERATION SELECT button on remote

controller, press RESET button on remote controller.

(LCD on remote controller displays all signs.)

Press OPERATE/STOP(ON/OFF) button on the
remote controller to send signal.

Yes

11

OK

Replace the indoor electronic

control P.C. board. ❈

Make sure the unit emits a beep tone.

No

Does the OPERATION INDICATOR
lamp on the indoor unit flash on?

Yes

Replace the deicer P.C.board. ❈

Before the unit resumes normal operation.

•Release the checking mode by pressing RESET
button on the remote controller, and then send
the unit signal to stop operation.

•Turn OFF the power supply to indoor/outdoor
units.

•Get indoor terminal blocks 11and 33opened, and
re-connect indoor/ outdoor wiring.

❈ Be sure to turn OFF the power supply to

[]

indoor/outdoor units in replacing P.C. board.

87

When OPERATION INDICATOR lamp flashes 6-time.

Measure
resistance
between CN 661
1 and 2.

No

Yes

Replace the
thermistor.

Defrost thermistor (RT61)

Re-connect CN661.
Turn ON the power
supply and press
the EMERGENCY
OPERATION
switch.

Does the resistance
of thermistor have
the characteristics
on page 96?

No

Yes

Does the unit operate
10 minutes or more?

Replace the deicer P.C.

board.

Ok ❈3

❈3 Defective contact of the connector is considered.

Turn OFF the
power supply.

After 3 minutes, does the unit
operate in COOL mode?

OK

Yes

Yes

No

After 3 minutes, does the unit
operate in HEAT mode?

OK

No

Replace the
deicer P.C. board

No

Replace the R.V. coil.

Turn ON the power supply and operate
the indoor unit in HEAT mode by pressing
the EMERGENCY OPERATION switch.

Is there 115V AC (MUH09), 208/230V AC
(MUH12/15/17) between CN7211 – 2 on
the deicer P.C. board?
Refer to page 96.

Replace the
deicer P.C. board.

Yes

Yes

No

Replace the R.V. coil.

Turn ON the power supply and operate
the indoor unit in COOL mode by pressing
the EMERGENCY OPERATION switch.

Is there 115V AC (MUH09), 208/230V AC
(MUH12/15/17) between CN7211 – 2 on
the deicer P.C. board?
Refer to page 96.

Thermistors in the outdoor unit are abnormal.

GG

Check of outdoor thermistor

(MUH09/12/15/17)

W Disconnect the connector CN661 from the deicer P.C. board.

(Check the characteristics of thermistor.)

Unit operates COOL mode even if it is set to HEAT mode.

w First, measure the resistance of R.V. coil to confirm it is disconnected or is not short-circuit.

HH

Check of R.V. coil

Unit operates HEAT mode even if it is set to COOL mode.

w First, measure the resistance of R.V. coil to confirm it is disconnected or is not short-circuit.

HH

Check of R.V. coil

(MUH09/12/15/17)

(MUH09/12/15/17)

88

Outdoor unit does not operate. (LED display: display OFF)

II

Check of power supply

Start

Check the connecting of main circuit parts and connector (CN501: I.P.M P. C. board,
CN 801: Electronic control P. C. board, CN554: relay P. C. board)

Turn on power supply

(MXZ30TN MXZ30TN2)

Is there voltage of 208V AC - 230V AC
in the power supply terminal block?

Yes

Is there voltage of 290V DC - 330V DC
across the smoothing capacitor?

Yes

Replace the electronic control P. C. board.

No

No

Check the power supply cable.

Is there voltage of 208V AC - 230V AC
across the output cable (LD63, LD64)
in the noise filter P. C. board?

Is there voltage of 208V AC - 230V AC
across the input terminal part in the
diode module (DS61)?

Check the main circuit parts
and replace it.

Outdoor unit does not operate. (LED display:

JJ

Check of serial signal

Start

(MXZ30TN MXZ30TN2)

0000

Replace the noise

No

filter P. C. board

Yes

Replace the current

No

limiting resistor.

w When replacing, check the

Yes

connection of connector
CN720 in the outdoor
electronic control P. C.
board

)

1. Check the indoor unit with referring to F How to check mis-wiring and serial signal error.

2. Turn off the power supply of the indoor and outdoor unit and connect the indoor/outdoor unit
connecting wire correctly.

3. Check the connection of indoor/ outdoor unit connecting wire in the outdoor unit terminal block,
and check the connection of the connector (CN601: unit A, CN 602: unit B, CN603: unit C) in
the electronic control P. C. board.

4. Disconnect the lead wire to the compressor. 3 minutes after turning on the power suppy, start
EMERGENCY OPERATION.

Is there voltage of 5V DC - 10V DC between
No. 3 (+) and 1 (-) in the outdoor terminal block.

No

Recheck a connected circumstance of the indoor/ outdoor unit connecting wire.

Yes

Replace the electronic control P. C. board.

89

The cooling operation or heating operation does not operate. (LED display:

KK

Check of R. V. coil

• When heating operation does not work.

Start

1. Disconnect the lead wire leading to the compressor.

2. 3 minutes after turning on the power suppy, start EMERGENCY
OPERATION in HEAT mode.

(MXZ30TN MXZ30TN2)

0000

)

Is there voltage of 208V AC - 230V AC between
pin1 and pin 2 at connector CN913?

Yes

Turn off power supply of indoor and outdoor unit.

Disconnect the connector
CN913 in noise filter P. C.
board, and measure the
resistance of R. V. coil to
check the integrity.

Yes

Replace the 4-way valve.

• When cooling operation does not work.

Start

1. Disconnect the lead wire leading to the compressor.

2. 3 minutes after turning on the power suppy, start EMERGENCY
OPERATION in COOL mode.

No

Replace the R. V. coil.

No

1. Turn off power supply of indoor and outdoor unit, and
disconnect the connector (CN851, CN852) in the electronic
control P. C. board.

2. 3 minutes after turning on the power suppy, start
EMERGENCY OPERATION in HEAT mode.

Is there voltage 12V DC between
the connector CN852 pin 1 (+)
and CN851 pin 5 (-)?

Replace the noise filter P. C. board.

Yes

No

Replace the electronic
control P. C. board.

Is there voltage of 208V AC - 230V AC between
pin1 and pin 2 at connector CN913? W1

Yes

1. Turn off power supply of indoor and outdoor unit, and
disconnect the connector (CN851, CN852) in the electronic
control P. C. board.

2. 3 minutes after turning on the power suppy, start
EMERGENCY OPERATION in COOL mode.

Is there voltage 12V DC between
the connector CN852 pin 1 (+)
and CN851 pin 5 (-)?

Yes

Replace the electronic control P. C. board.

No

No

Replace the noise filter P. C. board.

Replace the 4-way valve.

W1If the connector CN913 is not connected or R. V. coil is open,

occurs between terminals even when the control is OFF.

90

•When cooling, heat exchanger of non-operating unit frosts.

•When heating, non-operating indoor unit get warm. (LED display:

LL

Check of LEV

Start

Turn on power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely.

(MXZ30TN MXZ30TN2)

0000, pp11

)

Is "click - click" sound heard?
Or, do you feel vibration of the LEV coil with a hand?

Yes

Normal

No

Disconnect the connector (CN791: unit A, CN792: unit B, CN793: unit C),
and measure the resistance of LEV coil to check the integrity.

No

Replace the LEV coil.

•When cooling, room does not get cool.

•When heating, room does not get warm. (LED display:

MM

Check of inverter/compressor

Start

Disconnect the lead wire to the compressor at terminals.

power suppy, start EMERGENCY OPERATION.

Measure the voltage between
each leading to the compressor.
U (BLK) - V (WHT)
V (WHT) - W (RED)
W (RED) - U (BLK)
Output voltage
COOL: 100V(58Hz) HEAT: 100V(58Hz)
Is voltage output? W1

Yes

Is output balanced?

Yes

Turn off power supply of indoor and outdoor unit,
and measure the compressor winding resistance
between the compressor terminals.
Is there resistance of 0.53" to 0.66" between
the each terminals?

Yes

Return the lead wire of compressor to former, and
turn on power supply to indoor and outdoor unit.
Three minutes later, start EMERGENCY OPERATION.

No

(MXZ30TN MXZ30TN2)

3 minutes after turning on the

W1 • After the outdoor fan starts running, wait for 1 minutes or more before

measuring the voltage.

•The output voltage values in the above table have the tolerance of i20%.

No

LED indicator the inverter
stops due to over current?

Replace the electronic
control P. C. board
with the I.P.M P. C. board.

No

Replace the
compressor.

0000, aa88

Yes

Yes

Replace the electronic
control P. C. board

)

1.Turn off power supply of the indoor

No

and outdoor unit, and disconnect
the connector CN 551 in the relay
P. C. board

2.Turn on power supply to the outdoor
unit, and after 1 minutes or more
passed, check the resistance
between the connector
CN551 pin 1 and pin 2.

0"

Check the resistance
between each terminal

Infinity

After 1 minutes has passed since the
power supply of outdoor unit was
turned off, disconnect the connector
CN 553 in the relay P. C. board.

Clarify the causes by counting time until the inverter stops.
0 to 10 seconds: compressor layer short
10 to 60 seconds: compressor lock
60 seconds to 5minutes: refrigerant circuit defective
5 minutes or more: normal

Replace the
relay P. C. board.

91

0"

Check the resistance
HPS (63H2).

Replace the
HPS (63H2).

Infinity

•When thermistor is abnormal. (When the LED displayis a table below)

NN

Check of thermistor

Start

(MXZ30TN MXZ30TN2)

Disconnect the connector in the electronic control P. C. board (see below table), and
measure the resistance of thermistor to check whether the thermistor is normal or not.

Normal

Reconnect the connector (CN661, CN662 and CN663) and disconnect the lead wire leading to the compressor.

3 minutes after turning on the power suppy, start EMERGENCY OPERATION.

Does thermistor operate 10 minutes or more though the
thermistor abnormality is not displayed?

Yes

Normal

Thermistor
Discharge temperature thermistor
Defrost thermistor
Evaporation temperature thermistor
Fin temperature thermistor
Gas pipe temperature thermistor (Unit A)
Gas pipe temperature thermistor (Unit B)
Gas pipe temperature thermistor (Unit C)

Symbol

RT61
RT62
RT63
RT65
RT66
RT67
RT68

No

Replace the electronic
control P. C. board.

Connector, Pin No.
Between CN661 pin3 and pin4
Between CN661 pin1 and pin2
Between CN661 pin5 and pin6
Between CN663 pin1 and pin2
Between CN662 pin1 and pin2
Between CN662 pin3 and pin4
Between CN662 pin5 and pin6

Abnormal

Replace the thermistor

•Fan motor does not operate or stops operating shortly after starting the operation.

OO

Check of fan motor

Start

(MXZ30TN MXZ30TN2)

Check the connection of connector (CN851, CN852) in the fan motor relay connector and electronic control P. C. board
at the noise filter P. C. board and connector (CN901, CN902) in the noise filter board.

Disconnect the fan motor connector, and measure the resistance of the
fan motor winding to check the winding characteristic.

Normal

1. Disconnect the lead wire leading to the compressor. Turn on power supply to the
indoor and outdoor unit. Three minutes later, start EMERGENCY OPERATION .

2. Check the voltage between pin 2 and pin 3, pin 2 and pin 5, pin 2 and pin 6 at the fan motor connector.

Is there voltage of 208V AC - 230V AC?

No

1. Turn off power supply of the indoor and outdoor unit, and disconnect the connector
(CN851, CN852).

2. Is the voltage 0V, when the voltage between CN852 pin1 (+) and CN851 pin1 (-),
pin2 (-), or pin3 (-) are measured after the power supply is turned on the outdoor unit?

Yes

Is there voltage of 12V DC between CN852 pin1 (+) and CN851 pin3 (-), when power
supply turns on the indoor unit and EMERGENCY OPERATION starts in three minutes.

Yes

Replace the noise filter P. C. board

Yes

92

Abnormal

No

No

Replace the fan motor

Replace the electronic
control P. C. board

Infinity

0"

Yes

No

Yes

Start

1. Disconnect the connector CN722 in the electronic control P. C. board.

2. Check the resistance of HPS after 1 minutes have passed since the outdoor unit power supply was turnd off.

Check the resistance between
each terminal?

Return CN722 to former.
Turn on power supply to the indoor and outdoor unit.
3 minutes lator, EMERGENCY OPERATION starts.

Is HPS protection displayed
immediately after compressor
starts.

Replace HPS (63H1).

Replace the electronic control P. C. board.

Normal

•When the operation frequency does not go up from lowest frequency.

PP

Check of HPS

(MXZ30TN MXZ30TN2)

QQ

The other cases

(MXZ30TN MXZ30TN2)

In the case that the indoor fan and outdoor fan operate but the compressor does not operate, it causes that the
high pressure switch can be operated once.
First of all, check the high pressure switch can be shorted, turn OFF the power and turn ON again 1 minute later.
Indoor unit does not operate. (difference modes)

• When you try to run two indoor unit simultaneously, one for cooling and the other for heating, the unit which
transmits signal to the outdoor units earlier decides the operation mode. The other unit indicates as shown in
the figure below.

• When the above situation occurs, set all the indoor units to the same mode, turn OFF the indoor units, and
then turn them back ON.

• Though the top of the indoor unit sometimes gets warm, this does not mean malfunction. The reason is that
the refrigerant gas continuously flows into the indoor unit even while it is not operating.

OPERATION INDICATOR

Lighting Flashing

93

TEST POINT DIAGRAM AND VOLTAGE

32F50 68 86 104 122 140

MSH09TW MSH09TW -

U1

Indoor electronic control P.C. board

Varistor(NR11)

Fuse(F11) 250V AC 3A

Fan motor

Power supply input
1 15V AC

--

Timer short mode point
(JPS, JPG)
(Refer to page 73.)

12V DC

}

+

Room temperature
thermistor(RT11)

Indoor coil
thermistor(RT12)

Auto restart function
Solder the Jumper wire or
the Resistor 220Ω to the
JR07.(Refer to page 74.)

Emergency operation switch

+

5V DC

}

--

Room temperature thermistor(RT11)
Indoor coil thermistor(RT12)

94

TEST POINT DIAGRAM AND VOLTAGE

32F50 68 86 104122 140

MSH12TN MSH15TN MSH17TN MSH12TN - MSH15TN - MSH17TN ­Indoor electronic control P.C. board

Fan motor

Very

Med. Low High

Low

C11

}

8 7 5 6 4 3 2 1

Varistor(NR11)

Fuse(F11) 250V AC 3.0A

CN201

Power supply input 115V AC

}

JP17

+

12V DC

JP16

}

--

U1U1U1

JP11

+

5V DC

JP24

CN104

JHA

Emergency operation switch
JPS
JPG

Indoor coil thermistor(RT12)
Room temperature thermistor(RT11)

Room temperature thermistor (RT11)
Indoor coil thermistor (RT12)

}

--

Auto restart function
Disconnect the AUTO RESTART ASSY

}

from CN104, and solder the Jumper wire
to JHA.(Refer to page 74.)

Timer short mode point

}

(Refer to page 73.)

95

MUH09TW MUH09TW -

Defrost thermistor (RT61)

Ambient temperature thermistor (RT63)

-4 14 32 50 68 86 104

0

10

20

30

40

50

60

70

80

90

100

Temperature(°F)

Resistance(k")

U1

MUH12TN MUH12TN - MUH12TN ­MUH15TN MUH15TN - MUH15TN ­MUH17TN MUH17TN -

U1

Outdoor deicer P.C. board

U2U1

U2U1

Outdoor fan motor

115V AC(MUH09)
208/230V AC(MUH12/15/17)

}

R.V. coil

115V AC(MUH09)
208/230V AC(MUH12/15/17)

}

R601
5~10V DC

}

+
CN730

Power supply input

115V AC(MUH09)
208/230V AC(MUH12)

}

Power supply

input 208/230V AC

(MUH15/17)

}

Defrost
thermistor
(RT61)

}

Ambient temperature
thermistor(RT63) is only

for MUH09TW -

MUH12/15/17TN -

Ambient
temperature
thermistor(RT63)

}

Fuse 2A/250V

Defrost interval
time short pin
(JP607,R853)
(Refer to page 72.)

+

J9

}

J8

U1

and

U1

5V DC

.

}

12V DC

+

+

}

52C

12V DC

96

Jumper wire for change in

defrost setting (JPC, JPE)

(Refer to page 72, 73.)

TEST POINT DIAGRAM AND VOLTAGE

OFF

0V
0V
0V

Outdoor fan
Outdoor fan
Outdoor fan

Low
12V
12V

0V

High

12V

0V

12V

Very high

12V

0V
0V

MXZ30TN MXZ30TN2
Electronic control P.C. board

700
600
500
400
300

Resistance (KΩ)

200
100

0

32 50 68 86 104 122 140 158 176 194 212 230 248

Discharge temperature thermistor

0.3~0.6V DC

Evaporation temperature thermistor

2.5~4.0V DC

Discharge temperature thermistor

Temperature(°F)

Defrost temperature thermistor

2.5~4.0V DC

Gas pipe temperature thermistor
Evaporation temperature thermistor
Defrost temperature thermistor

100

90
80
70
60
50
40
30

Resistance (kΩ)

20
10

0

-4 14 32 50 68 86 104

Temperature(°F)

Fin temperature thermistor

1.0~4.0V DC

200
180
160
140
120
100

80
60

Resistance (KΩ)

40
20

0

32 50 68 86 104 122 140 158 176

Temperature(°F)

0~5V DC

12V DC

5V DC

R.V. coil
12V DC

-

{

Serial signal Room C 5~10V DC

{

Serial signal Room B

5~10V DC

{

Serial signal Room A
5~10V DC

{

Relay 12V DC

{

+

-

-

-

-

-

-

-

{

LED monitor indication

Room C

Room B

Room A

Gas pipe temperature
thermistor 2.5~4.0V DC

97

{

High pressure switch

Liner expansion valve(LEV)
12V DC pulse wave

MXZ30TN
Noise filter P.C. board

OUTDOOR FAN
208V-230V AC

{

{

208V-230V AC
OUTPUT

{

208V-230V AC
INPUT

REVERSING VALVE

208-230V AC

MXZ30TN2
Noise filter P.C. board

OUTDOOR FAN
208-230V AC

REVERSING VALVE

208-230V AC

{

{

{

208-230V AC
OUTPUT

Replace them at
the same time

{

208-230V AC
INPUT

{

98

I.P.M P.C. board

Relay P.C. board

12V DC

{

12V DC

{

12V DC

{

{

290V-330V DC

High pressure
switch

12V DC

{

{

{

Short

99

RELAY OPERATION
MSH09TW
MSH12TN
MSH15TN
MSH17TN

MSH09TW ­MSH12TN ­MSH15TN ­MSH17TN -

1. COMPRESSOR CONTACTOR

• EACH MODE

U1

U1

U1

U1

MODE

COOL &
COOL mode
of I FEEL
CONTROL

DRY &
DRY mode
of I FEEL
CONTROL

HEAT &
HEAT mode

THERMOSTAT

ON

OFF

ON

OFF

ON ON

52C CONTACTOR

ON

OFF

OFF for 2 min. after
unit starts operation.

Repeat of 8 min. ON/3min.
OFF operation or 2 min.
ON/3 min. OFF operation

Repeat of 4 min. OFF/
1 min. ON operation

AUTO or set speed

AUTO or set speed

AUTO or set speed links with 52C
contactor.

AUTO or set speed

of I FEEL
CONTROL

NOTE : Once the compressor is OFF, “3-minute time delay circuit” works at next start-up.

• COIL FROST PREVENTION

MODE

OFF

THERMOSTAT

52C CONTACTOR

OFF

OFF or Very Low speed

COOL &
COOL mode
of I FEEL
CONTROL

DRY &
DRY mode
of I FEEL
CONTROL

ON

OFF for 5 min. After
that, OFF is pro­longed until indoor
coil thermistor reads
termination temper­ature.

AUTO or set speed

AUTO or set speed
<MSH12/15/17>

Low speed when coil frost prevention
starts while COMPRESSOR OFF

INDOOR FAN SPEED

INDOOR FAN SPEED

2. SOLID STATE RELAY (INDOOR FAN MOTOR RELAY)

MSH12TN MSH15TN MSH17TN MSH12TN - MSH15TN - MSH17TN -

Indoor fan speed

High

Med.

Low

Very Low

OFF

Relay turning ON

SR144
SR143
SR142
SR141

All fan relays are OFF.

U1U1U1

100